Bung Mustard 

Firey, bung burning, explosive diarrhea. Like liquid acid pouring from your back door. Leaves the oring stinging for some period of time.

Oh man the bung mustard is really bad. I may have food poisoning. My ass is on fire!!!

Bung Mustard by Eaton Holgoode April 12, 2017

Mustard Tiger 

Greatest insult in the world.
originated on trailer park boys

Bubbles: You dirty...Mustard Tiger!

Phil Collins: AW HELL NAW!!!

Mustard Tiger by Jed BaCON January 2, 2008

Mustard Face 

someone who is clearly pissed off, shitty and in a mood and it blatantly shows. They have a face like they have eaten a spoon full of mustard

"check out the mustard face on her, she is not happy about that!"

Mustard Face by half baked Jake April 2, 2010

Eating a burger with no honey mustard 

Eating a burger with no honey mustard

“Eating a burger with no honey mustard, Eatin’ a burger with no honey mustard”

Eating a burger with no honey mustard by Zhongli January 4, 2021

Gutter Mustard 

When someone is so drunk they walk out of the bar and puke in the gutter or on the curb. The vomit is normally a yellow hue from all the beer they have consumed; like mustard.

Oh look there goes Jim he is making Gutter Mustard again

Gutter Mustard by Hearevil October 1, 2010

The Hen's Mustard 

Used colloquially to mean an unnecessary addition of something 'Exciting' to what is already considered a functioning - if boring activity/object/product

"I used to quite like Dave's car, but that spoiler really is the Hen's Mustard"

The Hen's Mustard by navarrone906 March 14, 2017

Sharty Mustard Butt 

When somebody sharts in their underwear and wallows around in it for a long period of time. The color and texture resembles a mustard like substance.

Brian is a sharty mustard butt.

Sharty Mustard Butt by KrissyNJbo June 19, 2010