Mad

[Couch Potatoe]

Most predominantly used in the greater New York area, mad is an appropriate replacement for Northern Californias [hella] and Bostons [wicked]. In the common vernacular, it translates into a lot or extremely. Can be used almost interchangeably with any of the above listed words.

For the most part, it means angry.

[Sarah]

1: really or extremely
2: alot

[Sonia]

(adj.) an adjective used to enhance a noun.

[Little_Girl]

Wikipedia says:
A MAD Movie is a Japanese fan-made video, much like an anime music video (AMV), that generally originate from the Japanese website Nico Nico Douga. MAD can also describe the Japanese AMV community, although they can be anything from audio clips, edited pictures, to wholly original creations. MADs do not necessarily even need to be related to anime, though the more popular ones typically are. The term MAD (occasionally M@D) is thought to be a reference to the name of one of the original MADs, rather than a particular acronym for anything.

[Renato]

[My brother] [is mad]. He is mad that his definitions on urban dictionary got [rejected].
Im writing this to piss him off.