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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a very good time(from the the name of a toy consisting of a plastic barrel filled with flat plastic monkeys that can be hung by each others curved arms)
That dance was more fun than a barrel of monkeys
by The Return of Light Joker November 18, 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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This term is used as sarcastic description of something not being very much fun. A barrel of monkeys are actually little plastic monkeys, and their arms can loop together to make a chain. In other words, not very fun.
by dudefromSD November 28, 2007
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When a group of men stand in a circle to jerk each other off, you stroke the guy to the right while cupping the guy to the left of you, therefore your arms are bent like that of a plastic monkey from barrell full of monkeys
Dude, you know frat boys sit around jerking one another looking like a barrell full of monkeys
by toadpuss May 23, 2011
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