Top Definition
K.A.B.F is short for Knee Buckling Ass Fuck. Often times used in a derogatory way towards someone.
"God damn Mary needs a good K.A.B.F she is so uptight"
#k.a.b.f #kbaf #knee buckling ass fuck #knee buckleing ass fuck #knee buckler
by Blakalake August 30, 2006
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