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1. fuck buck
its when you peel the label off of a bottle of beer (ie. Sam Adams Pale ale) perfectly, then you can give a girl the label and she has to have sexual intercourse with you
hey girl, here is this fuck buck, you have to fuck me now.
2. Fuck Buck
A cheap prostitute, only costing one buck.
Guy#1: Hey, let's go get us a fuck buck!
Guy#2: Hell yeah, they is only a buck!