Similar to "swamp ass" but found in the male gentile region. It is used as an insult to describe someone or something of a foul nature.
Johnny: Bro, did you meet the new boss?
Jimmy: Yea man, he's worse than "bag slag" on a hot summer day.
Jimmy: Yea man, he's worse than "bag slag" on a hot summer day.
by IMsmith October 29, 2011