This is an alternative name for marijuana. It is often used at the office/workplace or in emails so that other words for pot need not be used.

As in good, not as food but naming or calling something 'mustard' means this is good.

Another slang word for money, similar to 'cheese'.

Good, Pleasing to oneself, exciting

A tangy sauce often put on hotdogs and hamburgers. Called mustard because it is in fact the same color as mustard

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.

A gold stripe commonly accompanied by a diamond white wall stripe on automotive tires called "Vouges"

it supposedly means you have a juicy dick.. and is most commonly held on a name that starts with an S or D. If you get your hands on one of those than be sure to get in their pants as soon as possible!