mustard slide

Asshole. Funniest euphemism I've ever heard. A fellow student in NCO school used it way back when.

That gay dude liked nothing better than to take it up the mustard slide!

by BobC February 8, 2006

reverse mustard slide

Anal sex, when yellow mustard is used as the lubricant.

Sex getting boring, try a reverse mustard slide to spice things up.

by derksoda December 7, 2009