A slang term, originating from the Jamiacan/West Indian slang for a gay man "batty boy," perhaps originating with the misbelief that homosexuals often wash each other in their own semen.
Also spelt: "botti wash" or "bati wash"
"What's thatwhite stain on your pants Dan? It looks like you didn't clean up your batty wash."
"I'm going to spray you with my batty wash, Seana!"
"Fuck you Dhruvin, I know you just masturbated, you better clean that batty wash off of your hands before you touch me"
jamaican crack dealers do this to female (custy`s) when they have no money but want some candy its consist of washing the (batty)(ass hole) with her tongue for crack cocaine