(US campus, Calif.) to expose one’s buttocks for the purpose of evoking shock and/or amusement.
|Current Sl. V:1 20: Hang a B.A., v. To exhibit one’s naked posterior.|
|(con. 1950s) Age of Rock 2 (1970) 101: Certain college studs [...] displayed their naked asses to passersby, an act variously called [...] handing out the b.a., gotcha.‘The Fifties’ in Eisen|
|Sl. U. 25: That guy just hung a B.A. right in front of my mom!|
|Street Talk 2.|