Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. The end of a hammerhead opposite the flat striking surface, often wedge-shaped or ball-shaped and used for chipping, indenting, and metalworking.
- v. To hammer, bend, or shape with a peen.
Century Dictionary and Cyclopedia
- n. That end of a hammer-head or similar tool which terminates in an edge, or in a sharp, rounded cone-shaped, hemispherical, or otherwise specially modified point, as distinguished form the ordinary flat face. See also cuts under hammer.
- To treat by striking regularly all over with the peen of a hammer.
Wiktionary
- n. slang Penis.
- n. The (often spherical) end of the head of a hammer opposite the main hammering end.
- v. To shape metal by striking it, especially with a peen.
GNU Webster's 1913
- n. A round-edged, or hemispherical, end to the head of a hammer or sledge, used to stretch or bend metal by indentation.
- n. The sharp-edged end of the head of a mason's hammer.
- v. To draw, bend, or straighten, as metal, by blows with the peen of a hammer or sledge.
WordNet 3.0
- n. the part of a hammerhead opposite the flat striking surface (may have various shapes)
Etymologies
- Etymology uncertain. Possibly from Old French panne, pene, (whence Modern French panne "peen"); possibly from a Scandinavian source, compare dialectal Norwegian penn "peen" or Danish pind "peg". (Wiktionary)
- Probably of Scandinavian origin. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“I'm sure your hubby was shocked, but when, really, is she going to see another 'peen'?”
“But I've never been one for the male bimbo look, especially when (as the folks at Defamer reported) said male bimbo bares his, ahem, "peen" (to quote my esteemed colleague Michael Slezak), while playing the didgeridoo.”
“But I’ve never been one for the male bimbo look, especially when (as the folks at Defamer reported) said male bimbo bares his, ahem, "peen" (to quote my esteemed colleague Michael Slezak), while playing the didgeridoo.”
The real reason Matthew McConaughey's 'Surfer, Dude' went under | EW.com
“He picked up a ball-peen hammer, leaned on the passenger-side fender, and tapped twice on the EGR valve.”
“Then, with the ball-peen still in hand, he stepped up to the Formula, and with one smack he cracked the back corner of the intake manifold all the way through.”
“Would Kimberly-Clark prefer that dogs be punished with ball-peen hammers?”
The Washington Post: Gene's plea: Don't take the heart out of toilet paper
“Just so you know, (and don't try it yourself), I tried to sell a do-it-yourself gas mileage improvement/dimple kit a year ago on Minneapolis craigslist, auto section. $50 for a ball-peen hammer.”
Can A Car's Gas Mileage Be Improved By Adding Golf Ball Dimples? » E-Mail
“Congratulations, your physical penis has now fully dissolved in favour of your newly enlarged e-peen!”
“Nor is it stated why Aaron agreed to be part of The Syndicate's diabolical schemes - much less the purpose of the Syndicate's said diabolical schemes which, incidentally, involves the titular ball peen hammer and the back of people's heads.”
“It seems like before the feds take out a sledge hammer on the charter industry, they should try a ball-peen hammer.”
The Huffington Post: AlaskaDispatch.com: Federal regulations threaten Alaska's halibut skippers
Lists
These user-created lists contain the word ‘peen’.
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The Whole Ball of Wax
Feel free to wax poetic.
the whole ball of..., wax poetic, wax, beeswax, ambergris, cedar waxwing, sealing wax, earwax, paraffin, bougie, epicuticular wax, waxing gibbous moon and 192 more...
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Logolepsy
"Luciferous Logolepsy is a collection of over 9,000 obscure English words. Though the definition of an 'English' word might seem to be straightforward, it is not. There exist so many adopted, deriv...
Anschauung, Areopagus, Argus, Briarean, Dei gratia, Dei judicium, Deo volente, Duecento, Foehn, Geflugelte Worte, Gegenschein, Hakenkreuz and 9230 more...
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The Penis Game
Euphemisms for the penis.
See also:
A Testicle by Any Other Name
Ward, I'm worried about the beavermale interfemoral..., penis, dick, cock, prick, willy, percy, peter, one-eyed trouser ..., piece of pork, wife's best friend, dong and 79 more...
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Words for everyday things
tittle, lunule, crepuscular ray, ferrule, gynecomastia, muntin, akimbo, skeuomorph, paresthesia, obdormition, phosphene, armscye and 9 more...
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Twitter faves
The new favourite words of people on Twitter.
A script searches Twitter for "X is my new favourite word" and adds it to this list.
See also:
niglets, aw, flakey, shiznit, thatch, sexy, bummers, hotty, eargasms, ratchetry, weird, fab and 457 more... -
Twitter favorites
The new favourite words of people on Twitter.
A script searches Twitter for "X is my new favorite word" and adds it to this list.
See also:
grabbable, retuiteando, leaving, fantastic, absolutely, kurwa, hella, ridic, underpass, hate, interlude, plush and 2369 more... -
Really Cool Four-Letter Words
I marvel at the amazing variety of four-letter words in the English language. And that's not even counting really common (to me) words like fuck.
ibis, pelf, sofa, iota, oboe, lava, icon, sped, puha, pulp, puma, kyat and 150 more...
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It Has a Name??
Yes. Yes it does.
aglet, armsaye, scroop, rowel, ferrule, rasceta, chanking, philtrum, frenulum, keeper, agelast, punt and 285 more...
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Damieng's Words
lupine, sapor, boz imp, imp, ovine, saracen, haberdashery, tiebar, shill, cutler, cutaway, lucite and 218 more...
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Papageno's Words, Pt. I
hobbledehoy, absquatulate, chthonic, prolix, ululate, internecine, verisimilitude, animadversion, concupiscence, vertiginous, cucullate, lucubrate and 1554 more...
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bobodod's Words
cultie, screwery, gauge, wanker, truthiness, harangue, mediocre, ragamuffin, elysian, spoonerism, loquacious, apostle and 240 more...
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good words
words that are mostly fun to say or just lovely
undulate, voluptuous, whimsy, parse, dank, cerulean, peen, traipsing, listless, coup de grace, reconnoiter, mercurial and 499 more...
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Just 'cause I like 'em, P
pellucid, pertain, pampas, prate, pinecone, philistine, pantocrator, papaverine, postmeridian, potlatch, pharology, pinniped and 622 more...
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trustknot's Words
codger, curmudgeon, amok, torpid, turgid, craven, crepuscule, twilight, spry, mot juste, dross, schadenfreude and 66 more...
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Prosie: from Urquhart's Rabelais
Excerpt from chapter XI of Book 1 of Sir Thomas Urquhart's 1653 translation of Gargantua and Pantagruel:
This little Lecher was alwayes groping his Nurses and Governesses, upside down,...pretty rogue, little couille br..., crimson chitterlin, lustie andouille, futilletie, llinkie pinkie, pretty pillicock, hony pipe, pouting stick, dresser, pusher, in and to and 28 more...
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working words
erg, ergative, ergometer, energy, ergonomics, exergue, synergism, synergid, liturgy, exoergic, exergonic, urge and 30 more...
Tweets
Looking for tweets for peen.

reesetee That makes sense. OED lists zillions of spellings, but it does define peen as "end of a hammer head opposite the face; (formerly) spec. the sharp or thin end." So we can both be correct. :-) Apr 7, 2008
frindley That's quite possible; it's years since my dad taught me all this stuff. And the thing that makes me think you're right is that one of the hammers was the "ball pein" hammer (yes, different spelling), which had a rounded, mushroomy striking surface opposite the regular flat one. And then there was the "claw hammer", which was much better at removing nails. I have probably been misled by the name of the ball pein hammer into thinking that peins/peens are by definition rounded. Apr 7, 2008
reesetee Isn't it still called a peen, though, despite the shape? Apr 7, 2008
frindley Unless it's a claw hammer… Apr 6, 2008
reesetee The end of a hammerhead opposite the face (striking side) Feb 23, 2007