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20.
The substance which Cackletta's most favorite student, who is named Fawful will spread on the sandwich of said bad guy's desire. The mustard of Mario and Luigi's doom
Princess Peach’s voice will soon be the bread that makes the sandich of Cackletta’s desires! And the battle shall be the delicious mustard on that bread! The mustard of your doom!
by aaron the bannom November 23, 2003
 
1.
As in good, not as food but naming or calling something 'mustard' means this is good.
'Last Night Was Mustard'
'That Game Was Mustard'
by SM66 November 07, 2007
 
2.
Good, Pleasing to oneself, exciting
That's fair mustard innit bruv.
by Jimbo Jet Set October 23, 2003
 
3.
Another slang word for money, similar to 'cheese'.
"...Friends want to leave when they see you outta mustard..."
-Lil Wayne
by JoSé February 18, 2005
 
4.
British slang, originating from Pilsley, Derbyshire: A weak expletive which shares both its definition and conventions of use with the word bastard. Originally, "mustard" was used to refer to a child born out of wedlock, but through a process of semantic broadening, it is now mostly used as a general pejorative term. It can be used both as a noun (see example one) and an adjectival intensifier (see example two). The word bastard is used in precisely the same way. As an antidote to your ignorance, other examples of intensifiers are: fucking, bloody, chuffing, sodding, etc.
Example one: My phone's such a mustard; the autocorrect feature has made a fool of me yet again.

Example two: Arghh, my mustard phone has caused me ridicule!
by Coconut Noggin. February 10, 2012
 
5.
Slang for money
You get busted, I neva leave home without mustard
- Method Man (He's from Queens/Long Island so this rhymes)
by johnnyblaze March 08, 2008
 
6.
Bold in the sense of bad. Edgy and difficult, bad. Used in Northern Ireland
That wee boy is just mustard.
by AidanG August 28, 2005
 
7.
A tangy sauce often put on hotdogs and hamburgers. Called mustard because it is in fact the same color as mustard
Hand me the bottle of mustard please
by Habeus February 17, 2005