Top Definition
A substance that a certain subset of Weight Lifters ingest to increase muscle mass. Bronaise is created by rapidly stroking another man's penis and swallowing the ejaculate. Bronaise can only be attained from another man, and must be fresh to work.
Jeff's gained 20% muscle mass over the last few weeks using massive doses of Bronaise. He's ripped!
by Freidan March 12, 2013

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