What is 30 Minute Shit?
When your friend says they are going to take a "crap" and come back thirty minutes later because instead of just taking a crap they jacked off and used taking a shit as an alibi.
guy:yo guys.. im gunna.. uhh.. take a crap ill be back.
guy2:wow dude hes pullin a 30 minute shit.
30 minutes later...
guy2:wow finally you stopped wackin' off