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Literally, What The Fuck Boner, a WTFB is an erection which develops at a seemingly inexplicable moment. It is characterised by a swelling of the penis, as well as a distinctive absence of arousing stimuli.

When a male gets a WTFB around a group solely consisting of other males, it is appropriate to announce your WTFB publicly, so as to avoid being labelled a fag.
"Dude, I was doing my maths homework when suddenly I got a WTFB. Wtf?"

"Woah, WTFB. Don't know why that happened around this group of athletic and sculpted men."
WTFB by Innominate February 1, 2008
Related Words
Combination of WTF and FB. Literally, a "what-the-fuck-buddy". Someone you like, and have sex with, but can't tell whether or not you're in a relationship or not.
J: "I haven't seen my WTFB in almost a week."
M: "... I just hung out with him yesterday."
J: "He gets along with my friends better than I do! When do I get to have sex with him again?"
WTFB by Jake_W May 29, 2009
Abbreviation of What the Facebook? An appropriate response to questionable or hilariously stupid Facebook posts or updates.
Yeah, troll dolls? WTFB?
WTFB by Mody C. July 11, 2010
Literally, What The Fuck Boner, a WTFB is what one develops at a seemingly inexplicable moment. It is characterised by a swelling of the penis, as well as a distinctive absence of arousing stimuli.

When a male gets a WTFB around a group solely consisting of other males, it is appropriate to announce your WTFB publicly, so as to avoid being labelled a fag.
"Dude, I was doing my maths homework when suddenly I got a WTFB. Wtf?"

"Woah, WTFB. Don't know why that happened around this group of athletic and sculpted men."
WTFB by Innominate January 11, 2009
Where's the fireball!? A phrase commonly asked at a party, around a bonfire, of after Thanksgiving dinner when drinking with the family.
"Brian WTFB!?"
"Its in the freezer, I'll go grab it!"
WTFB by Ickycoffee November 26, 2020
A new yet unknown phenomena. When a person (usually a lolcow) posted something that was very serious in an extreme manner, the flamming/trolling against these types of people immediately stops and he or she becomes a wtfbull for the rest of their lives. Unlike lolcows, wtfbulls grows an amount of wtf and lose (similar to how a bull grows its horns). Due to this, the said person can cause you to go insane.

Do not approach them, avoid them at all cost and run for your life because you may get hurt by their "wtf" horns.

( )
|___|
(oo)
/-------\/
/ | WTF ||
* ||----||
^ ^
Run! This lolcow is now a wtfbull, run as fast as your can!
wtfbull by TheDickSwordz December 22, 2021