Top Definition
The leader of a pack of bros; inspires the worship of subordinate bros through being slightly more articulate and much more aggressive, and having both a higher alcohol tolerance and better luck with the bro hoes.
At a frat party:

Rachel: What's the matter with all the bros tonight? They seem subdued.

Sarah: Yeah, Vinny's not here. They're totally lost without their alpha bro.
by ameech November 05, 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt