Bachelor Party Bitch out 

—Verb phrase - To avoid one's responsibility to friends and roommates who are set to be betrothed; renege; back out usually with excuses that are found wanting

—Origin:
2004; akin to Muthin Out, Streiffin out

—Synonyms
1. See Blazin Out

— Antonym
1. Loyal
2. Righteous

Dude Andrew is pulling a bachelor party bitch out because his mom is in town, sad part is he's making her sleep on the floor.

Bachelor Party Bitch out by Shaved Ape Baby February 20, 2010