If CM Punk's looking for another MMA fight, there's already an opponent lining up -- Beetlejuice from "The Howard Stern show."
Beet was out in NYC where he explained why he'd bust Punk up worse than Mickey Gall.
In fact, BJ also called out Brock Lesnar -- calling him a "fat f***" and saying "anybody could knock his ass out."
Good luck, Beet ...
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