What is Muscle Fuck?
1.
1.To tighten the top of a can bottle or screw something so tightly the grooves are stripped and insuring noone else is able to open said item. this action implies sexual frustration.
you: Ay man fuck are you doing?
your friend: trying to open this bottle of soda
You: why your eyes gotta bug out like that
your friend: Man somebody muscle fucked the shit outa this.
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1.
When you do her from behind, wrapping her legs around your waist like a belt, while she clings to her walker like motorcycle handlebars...