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Hustle and Flow defined:
A combination of the terms “hustle” and “flow” that, when possessed and fused correctly, creates a distinct, undeniable swag. One needs hustle in order to flow, however too much hustle can really cramp the style of the flow. But a flow without hustle reaps no reward. One must be smooth and effortless in their display of the proper amount of hustle to properly emulate the swag of “hustle and flow.”$#!% son, that Boobie Miles sure knows how to hustle and flow.
Definition from Urban Dictionary.