mustard shirt 

a shirt that looks like diaharea mustard yes i cant spell

in my english class this really hott kid named chris wears a mustard shirt bc he nos he looks sexy in it giselle wants to slap his ass

mustard shirt by ivannahumpalot April 14, 2004

mustard shart 

The liquid that shoots out of a mustard container when you're expecting mustard, and not mustard juice/liquid.

This ruins a sandwich, even though you may have taken the percaution of squeezing it over the sink before your sandwich.

"damn, I made an awesome sandwich, but then I topped it off with mustard, and I got a nasty mustard shart instead!!"

mustard shart by chipoperson February 12, 2010

mustard shart 

When Tony eats an entire tub of mustard and subsequently shits his pants.

That Katz Deli Mustard Matt gave us was so good until I saw Tony mustard shart in his seat next to me.

mustard shart by Bigg Body October 3, 2018