pitching a fork
The act of raising one's hand with the middle and ring fingers folded down beneath a bent thumb, and the index and little fingers raised, micking a devil's orn or pitchfork.
"Holy fuck, somebody put Slayer on! I'm gonna pitch a fork!"
Trenary Pitch Fork
When you douse your arm in gasoline, light it, then fist fuck a cow in the fields of Trenary.
"I got wasted last night and gave my cow a Trenary Pitch Fork"