Its when you have intercourse with someone you see regulrly and Everytime you see them you like DAT ASS!
Carl: Yo mane u see shawty over, her name is Casey and dat ass is pokin.
Handu: Yes it is indeed, maybe u should engage in sexual intercourse with her
Carl: Yah homie, im bout to pull the ol casual rape
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi