Dude #1: She started to btfo when I asked her for a blowjob.

Dude #2: She doesn't even know that you don't actually pee out of the vagina yet, what do you expect?
by GodlyRape March 6, 2010
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Blacked The Fuck Out. A party term referring to when you comsume so much alcohol that you forgot the whole night.
at the kegger last night i btfo
by noodle5673 February 23, 2007
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Acromyn for Break the Fuck Out.
A house fire is a good example for BTFO'ing, also a boring party, earthquake, mudslide,etc.
by papillion July 12, 2006
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An engagement ring with a large and flashy diamond; perceived to be expensive (and often is).

When worn by a girlfriend/fiancee the message communicated by the ring is "BTFO, I paid for this. She's mine... and she knows it."

Sometimes perceived as frivolous spending, the BTFO Ring may instead be a sign of:
(a) insecurity,
(b) distrust, or
(c) high-maintenance women.
"Hottie at the bar... I'm moving in."

"Good luck -- Check out that BTFO Ring... You don't stand a chance."
by cdemay November 25, 2008
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