Someone who is constantly telling others how big their dick is when in fact its as small as a needle and the only thing that they could fuck would be the size of a needle point, hence knit.
Bobby:Dam I don't know why I can't get my dick into this girls pussy, must be the size of my dick.
John:Fo sho, cuz the last time you size your dick to mines was the time I realize that your dick was the size of a grain of sand.
Bobby:Man fuck you man, wtf do you know about the size of my dick.
John:Last night in your bedroom, your wife called jo ass a knit fuck and was only good for fucking the knit on her panties.
Bobby:Man fuck you!
by Falopian November 17, 2010
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