Crusty mustard

When a person has diarrhea and fails to wipe thoroughly leaving a yellowish brown crust on their ass

I was fucking this one girl in the ass and notices she had some crusty mustard leftover

by Imfluffy September 11, 2016

Crusty Mustard Face

A really ugly person that seems to always have left-over condiments dried on their face.

I saw Kyle on a date with some crusty mustard face.

by ExtendedMags April 14, 2012