Top Definition
When someone near you has has something occur which has made them become angry.

'mmm brewin' is used to express the anger which they are currently feeling. Works well when acumpanied with shaking and the bobbing of the body, sometimes in extreme cases the 'r' can be extended to add dramatic effect.
Yo, Jack word on the street is that the sket you boned last night has AIDS. You've gotta be mmm brewin'.
by Chris 'Ling' King March 20, 2008
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