Top Definition
Irregular Fuck Beat, or IFB, is a very off rhythm or IRREGULAR beat of one person giving it to their partner in the bedroom or where ever he and she may find it appropriate to bang.
*knockknockknock knock knock knockknockknockknock*
Dude do you hear that?
Yea wtf is that?
Not sure lets find out.
(in hall way outside of bedroom)
*knock knock knock knockknock knock knockknockknock*
Oh thats just He and She.
She did tell me earlier that He had a really bad IFB.
ooohh ok, at least move the bed away from the wall so others can all sleep.
by nbfootball3624 August 11, 2011
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