Leck mich im Arsch (English: Lick My Ass) is a canon in B-flat major composed by Wolfgang Amadeus Mozart, K. 231 (K382c), with lyrics in German. It was one of a set of at least six canons probably written in Vienna in 1782. Sung by six voices as a three-part round, it is thought to be a party piece for his friends.

The song's title and lyrics are a reference to anal-oral contact, and may be more idiomatically translated as "kiss my ass" or "get stuffed". They have been used as evidence to support the contention that Mozart had Tourette syndrome.