Definitions
Wiktionary
- military slang, Internet slang, text messaging Initialism of What the fuck.
- rare Where the fuck, why the fuck, when the fuck or who the fuck.
- sports World Taekwondo Federation
Examples
“I often use what I like to call the "WTF" effect, where the first line or paragraph causes the reader to wonder "WTF is happening here?" and want to keep reading.”
“I think I may have previously mentioned what I call the "WTF" effect ... the first few sentences make you wonder "WTF is going on here"?”
“Everyone in the room caught the reference to the acronym WTF—which in the military and elsewhere means “What the fuck?””
“And WTF is up with the Senate splitting jurisdiction over ‘mass transit’ into the Banking, Housing, and Urban Affairs committee and not keeping jurisdiction of the Commerce, Science, and Transportation committee?”
“But you guys who are so quick to dis him for it ought to ask yourselves WTF is wrong with your concept of how a democracy should work.”
“WTF, is this female genital mutilation thing? ... it should, be declared a crime & all practitioners should be arrested & thrown in jail. .it is worse than rape”
“WTF is it with forest moons in scifi, anyway they seem to breed annoying cultures.”
“For bonus points (one commenter said, “WTF is a “gendered identity”?”), you can read up on gender.”
“WTF is buzzoverm. blogspot.com as well as since does the spoof by them garner sufficient attention for Google to censure?”
“WTF is a U. S Congressman doing taking orders from anyone in the phucking Catholic Church?”
Lists
These user-created lists contain the word ‘WTF’.
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EN - abbreviations for chatters
Signs like ;-) are excluded as they wouldn't appear as Wordnik items anyway
A/S/L, AFAIC, AFAIK, AFK, AIAMU, AISI, AKA, AMBW, ANFAWFOWS, AOAS, ASAFP, ASAP and 296 more...
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acronyms
funny or odd acronyms
SMERSH, SPECTRE, CREEP, NAMBLA, SLORC, ATF, WTF, AWOL, SPARKS, PENIS, FEAR, NWA and 28 more...
Tweets
Looking for tweets for WTF.

pterodactyl Acronym Finder suggests several other things it might stand for, but I suspect that many of them were submitted facetiously. Jan 5, 2011
yarb For more wild speculation, and also a rare typo by bilby, see wtf. Jan 5, 2011
bilby Welcome to Finland. Jan 5, 2011
ruzuzu WikiLeaks Task Force. Jan 4, 2011
milosrdenstvi Wednesday, Thursday, Friday, right? ....right? Jan 4, 2011