mikey: carl your a bum crust nibbler carl : no ryan is a bum crust nibbler  ryan :no your both shirtlifters(gay boys)
someone who nibbles on bum holes that are crusty
"mikey: carl your a bum crust nibbler carl : no ryan is a bum crust nibbler  ryan :no your both shirtlifters(gay boys)" What is the definition of "bum crust nibbler"?