Mustard Butter

Semen after a long period of time without ejaculating - begins to coagulate and develop a yellowish tint.

After "No Nut November" I'm going to cover my girlfriend's back burger with my mustard butter.

by Mustard Butters November 22, 2019

mustard butterfly

The act of having diarrhea while wearing tighty whitey underwear. When underwear is removed a mustard butterfly is resembled.

oh snap i just crapped my pants, and checked my underwear, it looked like a mustard butterfly.

by jesterrox November 30, 2010