The facial expression achieved when you're taking a gigantic size bite out of a hamburger/hotdog and you expect ketchup but itstead it's fucking loaded with mustard.
"You should have seen that kid's mustard face after I falcon punched him in the testicles. Priceless."
"That old woman had a perfect mustard face after I crop dusted that elevator."
"That old woman had a perfect mustard face after I crop dusted that elevator."
by Red Fingaz May 5, 2009
Get the mustard facemug. 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
by half baked Jake April 2, 2010
Get the Mustard Facemug. by Young Cat Meat August 16, 2009
Get the Mustard Facemug. by ExtendedMags April 14, 2012
Get the Crusty Mustard Facemug.