1 definition by Dirty Rodriguez, and Seymour Johnson

assmustard

1. Produced after anal sex, the substance which seeps from the anus (mostly semen and fecal matter combined) which is commonly used as a condiment.

2. The substance produced when a person used any condiment as an anal lubricant.

After a long night of fucking, Lauren wiped the assmustard off the bed sheets.

by Dirty Rodriguez, and Seymour Johnson January 14, 2007