Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- v. To strike or cause to come into contact: She bonked her head going through the low doorway.
- v. To collide against something: His head bonked against the wall as he fell.
- n. A blow to the head.
- n. A hollow thud.
Wiktionary
- v. To strike or collide with something.
- v. To have sexual intercourse.
- v. To hit something with the front wheels of the skateboard, whilst in the air, this pre-dates the snowboarding term
- v. To hit something (especially a tree) with one's snowboard, especially while in the air.
- v. To experience sudden and severe fatigue in an endurance sports event due to glycogen depletion.
- n. A bump on the head.
- n. Any minor collision or random meeting.
- n. An act of sexual intercourse.
- n. A condition of sudden, severe fatigue in an endurance sports event caused by glycogen depletion.
WordNet 3.0
- v. hit hard
- v. have sexual intercourse with
Etymologies
- Imitative.
Examples
“*tink scraaaatch hey! bonk clink ow! tink tock bonk*”
supr genius kitteh - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?
“So it's important not to "bonk" - the term used to describe what happens when muscle fuel (glycogen) is depleted and a runner "hits the wall.”
“He passed out while standing, and the bonk was his cranium bouncing off the floor.”
The Volokh Conspiracy » Refusal to Consent to Caesarean Section as Neglect of the Child?
“I hazza hammer.. maybe we cud whak a bonk and flattin tehm owt!”
giggity giggity giggity - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?
“While, for an immersive sim, the hollow "bonk" noise engendered by hitting a rival is noticeably unrealistic.”
“Where I have been playing and chatting "bonk" is a short term for an automated emote from the game, saying something like: "Urk hits you over the head.”
“Speaking on Last Call with Carson Daly, Piper explained the terms "bonk" and”
“If you use a FFT application (measures resonances) and so much as "bonk" on a mandolin, anywhere on the mandolin, the FFT will detect all the resonances in the mandolin; top, back, air, body, all of them from one "bonk".”
“Your body stores and releases glycogen from the liver during these active times, but it only has so much ... so when cycling for example, people will 'bonk' or 'hit the wall', where they just run out of juice, so to speak.”
Discussion Forum - TuDiabetes - A Community for People Touched by Diabetes
“What I did notice, though, was that the remote was sticky-I'd hear the little "bonk" when I'd push a button, but on many occasions, that was followed by a pause before the thing did anything.”
Lists
These user-created lists contain the word ‘bonk’.
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Onomatopoetic
words (seemingly) formed in imitation of a natural sound
plash, guff, woof, splash, crash, pow, crack, bang, whoosh, whizz, whallop, fizz and 116 more...
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Sounds
words that describe sound
atchoo, atishoo, babble, bam, bay, beep, blast, blather, bleat, bleep, blip, bong and 241 more...
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Your Mother
Joyess
cramp, crumble, cringe, slope, fling, prone, freckle, plank, frock, tramp, slump, crotch rot and 36 more...
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Onk-tastic
Words containing the sound /ŏngk/.
Algonquin, Cronkite, Tonka, Tonkin, Wonka, Yonkers, bonk, bonkers, bronco, broncobuster, conk, conker and 31 more...
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onomatopoeias (1 syllable)
1 syllable words that mean what they sound like. (dictionaried or un-dictionaried words | onomatopoeic in nature)
onomatopoeias (2 syllable) | onomatopoeias (3+ syllables)gush, buzz, pop, woof, boo, bam, bang, bash, bump, clang, clap, click and 86 more...
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cycling terms
peleton, drafting, eschelon, bonk, battaglin, road rash, Tour de France, attack, blocking, breakaway, derailleur, drop and 35 more...
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britishisms
A tip of my hat to the snarkiest of English dialects. Here here!
Ponce, snog, bloody, barmy, blasted, blooming, bleeding, knackered, poppycock, wanker, tosser, cracked and 52 more...
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Accident-prone
Words that describe bunking into stuff.

ouibug This word is also used widely by endurance athletes. It is a name for the point reached during exercise at which the body has depleted its glycogen reserves and feels as though there is absolutely no energy or fuel in the body to draw from. Roughly equivalent to "hitting the wall."
Examples from An Ironman is Forever by Tammy Smith (http://www.ucdtri.com/articles/ironman.php):
"If an athlete fails to notice their nutritional needs, they may feel dizzy, disoriented and extremely tired. To triathletes, this is known as the sensation of "bonking."
"Before you start to bonk, you start to see stars and get kind of loopy, your muscles no worky," says 31 year old Juan Lang who is training for the Ironman Wisconsin Collegiate Championships in September. "When I actually start to bonk I start to lose coordination and judgment and it becomes kind of dangerous. It's totally dependent on whether you've had enough calories. I've actually seen someone just fall over off her bike."
"I know when I'm bonking because I look over and think "Oh, it would really nice if I could just go to sleep in that patch of shade right there," says Iley.
She remembers her worst bonk during the World's Toughest Triathlon in Auburn 2003. "It was during the run and all of a sudden I didn't know where I was and I was so disoriented that I didn't remember the last mile that I'd run. I was so dehydrated. I ended up in the fire station with four firemen around me asking if I was okay and feeding me water." Jun 16, 2009
goatboy A staple word of the British tabloid press.
Feb 5, 2008
sonofgroucho Your point being? Oct 27, 2007
oroboros Knob in reverse. Jul 22, 2007
uselessness O the glory days of youth, the exuberance of childhood, of bonking one's peers on the head with a wiffle bat. Jun 25, 2007