bust a flow

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

bust a flow

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