Making mustard

The act of urinating, mid anal coitus, into the recipients shitpipe while continually thrusting, until a foamy gelatinous Dijon ring is created around the base of your shaft. Most easily accomplished with morning wood, prior to cracking the seal of your 1st skanky, beer induced, chlamydia flavored amberbach piss of the day.

Since my boyfriend Steve's bladder has the capacity of an oil tanker, I made good use of my boner and urgently eminent need to piss by making mustard in his hairy, vacuous dick storage, to be used later that evening as a condiment for a lovely roast beef dinner.