Bl means Boys Love, it is often is used as another word for yaoi, which involves manga or anime. The book would most likely have the abriviation BL on it. Otherwise Warning this contains Gay things.
"YAY! SO I'M NOT LIKE ONE OF THOSE BL CHARACTERS!"
BL stands for Boys Love, BL is also an anime/manga genre somewhat close to yaoi.
Ball licking and sucking
She perfomerd BLS and sent me through the roof
an abbreviation for blease.
Person: Bls give me money
Other person: No
A less common abrieviation for bitch lasagna
T-series ain’t nothing but BL.