to suddenly become very agitated or irritable, as if one's period started.
Sorry man, but my mom is going to bust a flow if you come over.
by ru paulie April 26, 2009
1 more definition
Top Definition
To freestyle rap out of nowhere on a moments notice.
Ej can strait freakin bust a flow out of no where.
by Darren Blatt August 26, 2006

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