rottencrotch Share definition Flag A southern term usually used in place of someone's last name to denote foul bodily stench, unexplained vaginal moisture, and/or general uncleanliness. "Theres Billy Bob 'Rottencrotch' gettin all sweet on the preachers wife!" rottencrotch by Damien Dane December 17, 2006 Get the rottencrotch mug.