A street game in which you stab a knife between each of your fingers as fast as you can without hitting any.
Dude 1: Yo I lost two and a half fingers the other day playing five finger fillet.

Dude 2: Man you have to stop playing that.
by Caitlinxox7 August 31, 2006
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When the boy can fit all for of his finger and thumb into the woman's vagina.
by Parkerboi April 10, 2015
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