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 February 17, 2016
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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 February 17, 2012
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