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1.
A great, American ska band. Awesome music ^^
"We're gonna take on the woooorld, come on every boy, every girl!"
"This is your brain, this is your brain on ska"
by Z-chan June 04, 2004
 
2.
THE HOTTEST BAND THAT NO ONE KNOWS ABOUT ! the sexiest ska music ever!
Hey katie what song do u wanna have sex too?

MR. SMILEY BY MUSTARD PLUG!
by lizers April 14, 2005
 
3.
The Coolest band that no one knows about. Plays awsome Ska music!!!!
So Eliza have you heard of mustard plug?

Omfg they are the best band ever..we are going to the concert right?

HELL YEAH
by hottnes March 05, 2005
 
4.
the BEST ska band EVER from my hometown GRAND RAPIDS,MI
have u ever heard mustard plugs song lolita?
by girl grom GR June 22, 2005
 
5.
a totally kick ass ska band that no one has heard of. if you ask people if they listen to mustard plug, they look at you as if you had the word "dumbass" stamped on your forehead.
i love skanking to mustard plug!
by spartan73 January 15, 2006
 
6.
The dried bit of mustard that squirts out of the bottle first. (See also: "lotion booger.")
Dammit! I got a mustard plug on my hot dog!
by jukaswo November 06, 2007
 
7.
The crust left on the end of the eurthera after sex that makes pee go in several directions simultaneously.
"She got mad when I missed the toilet, but she calmed down when I told her I had a mustard plug."
by Helpful guy. April 11, 2014