1. Piss pulling the trigger occurs when drinking more than physically possible, competively or otherwise, and u get the feeling that u need to pull the trigger and piss at the same time, thus piss pulling the trigger.
2. Wasting the day away.
"I piss pulled the trigger all day today." "Hey guys, i'm gonna go piss pull the trigger. Be righ back." "Oh my goodness, I feel much better after piss pulling the trigger."
the act of forcing yourself to spew, and pissing, simultaneously. this is usually done after defeating an ultimate pussy bitch in a beer chugging contest the night before going to cape cod.
wickert piss pulled the trigger after he chugged 8 beers in 20 minutes.