Definitions by Monkey Boy K

dirty trombone 

When you pucker up and play a tune on a man's asshole while you trombone his cock.

Hand gestures really help to explain this one.

Eric didn't know how dirty Yvonne was until she gave him a Dirty Trombone...then he knew she was the gal for him.

or

Jeremy gave Todd a Dirty Trombone, and then they went rollerblading.

dirty trombone by Monkey Boy K July 5, 2006