1. a friend who is down for life and has an extreme weight/height size advantage over the general population.

2. something of monumental stature in a friendship.
Mike: "have you seen how big Jake has been getting since he's been using brazilian shark testosterone??!"

Jason: "word. brohemoth's getting swole."

Sean: "just wanted to say thanks for buying me that lap-dance from that circus contortionist for my birthday the other week. on a scale of 1-10, it's brohemoth."

Paul: "ain't no thing."
by concussionme August 22, 2009
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Another word for bro, such as broski or broseph. Adds variety into the bro/dude inventory.
by LandoCommandoYo July 14, 2011
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