Urinating into your partners anas during anal intercourse. Then continuing to thrust until the a yellow vicus substance excites feom the body.
I was making mustard in your sister last night.
by Branagain November 06, 2018
when a bloke opens his anal cavity and lets out stink air (fart) followed by a huge announcement of making mustard in his pants.
oh man i just saw elias walking down the street and he was TOTALLY making mustard when we made eye contact!
by mcdih April 21, 2025
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.
by Little Jonn August 20, 2024