Butt Mustard

The mix off blood, cum and shit that is often created during anal sex. It's dirty brownish yellow color and thick, soupy consistency resembles Dijon mustard.
How am I ever going to get that Butt Mustard off of my sheets before my girlfriend gets home?!?!?!
by Dan Lyons May 31, 2007
Get the Butt Mustard mug.