When a person is falsely accused of a wrongdoing so they harshly beat the accuser with a sock filled with frozenbutter and then proceed to ass rape the beaten persons wife or husband.
This is when two plus men have a fight for honor using only their testicles as weapons. It is similar to Swordfighting but is far more glorious and superior.
Did you see those guys fight last night?
Yeah they were buttersocking like hell!
His balls looked like swollen grapes after that shit!
Yeah but he regained his glory so it is worth the pain.
A sock full of butter in which someone is beaten with. They usually have a butter fetish or like to eat butter and/or socks. Buttersocks are a deadly weapon and have often been used by butter munchers as a way of softening butter before baking.
Guy1 "Let me beat you with my Buttersock"
Guy2 "Sure, I love butter"