Surgically removing the top of a beer can (preferably a Natty Ice) with a can opener so an individual will be able to expose themself to maximum beer chugging capability.
Male 1: I don't have the steady hands or the technology to chug this beer.

Male 2: Don't be a vagine, get a can opener and turn that can into a monkey barrel.
by Dikembe Fratumbo January 27, 2011
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To go off half-cocked or in a willy nilly sort way. A combination of barreling through something and monkeying around.

Most commonly used in an MMORPG while dungeon crawling with a large group whose members who may be apt to act like Leeroy Jenkins and get everyone killed.
"Ok when we get in to Blackwing Lair just stay put and don't go barrel monkeying around in there."
by Harvey Lopez January 11, 2007
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set of big tits. girl with big boobs
Look at them barrel monkeys. wow you have some big barrel monkeys
by Dingleberry Jones Jr. December 12, 2007
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