1 definition by you know what? bye
An acronym for "You Know What" aka the best comeback to use that completely throws the other person off.
Person 1: You're wrong. If a tree falls and nobody's there to hear it, then it does make a sound.
Person 2: ykw
Person 1: What?
Person 2: Exactly.
Person 2: ykw
Person 1: What?
Person 2: Exactly.
by you know what? bye April 20, 2011