Top Definition
The specific type of testosterone (male steroid hormone) released following bro-related activities such as getting your swell on at the gym, slamming hoes, bro-carting, and laxing.

The effects of testostebrone can be extended and enhanced by drinking brotein shakes.
After getting my swell on at the gym and banging that slam piece I met at the kegger last weekend, my testostebrone levels went over 9000.
by bro9000 February 24, 2011

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