What does Bumtash bum-tash mean?

Bumtash bum-tash meaning in Urban Dictionary

the video game in which, while having intercourse with a female doggy design, you wipe your hand across your poo stained arse and wipe it on their top lip. The theory becoming to put up in provided possible just before get tossed down. Extra things for blarting very first. another word for a dirty sanchez