The type of ass that is sought after in a club, party, or bar for grinding on, grabbing, or just looking at, but is a tad too big in a more sobering setting.
"Hey man, did you check out that party ass? I'm gonna hit that up later tonight."
After a fun filled evening of gorging yourself on alcholic beverages you may suffer from party ass, a feeling of heaveyness in your mid rift and could result in a long trip to the toilet
Jeff- Good night last night wasnt it hank?
Hank- Yeah dude feelin it today however i got that party ass feelin