- noun phrase -
comes from actions taken place at a party that would usually never take place in the real/outside world
i.e. when a guy sees a freakin' beefin'chick at a party he'll do stupid crap to try to impress her such as wrestle/fight others, strip, do pull ups, throw things, etc...
"Dude, why'd you beat me up last night? I didn't even do anything to you."
"Sorry man. Christine was there. But it was just a party action, don't take it personally."
"Oh alright. Cool man."