A jumbo-sized chicken from the '90s era cartoon Animaniacs. He can't fit into the normal society of farm chickens because he is as large as a human- they all run away when he comes near, as shown in his theme song. So he dresses up like a human to try to assimilate into human society. However, his disguises are usually terrible, the worst being just a mustache.

Only one human per episode can tell that he is a chicken; the rest laugh when that one human brings up the subject. But, somehow, Boo's costume always falls off, and the people find out he's a chicken. They usually maul him afterwards, and he goes back to his farm.

Boo was created on the Animaniacs episode "Taming of the Screwy", where viewers heard a man saying "He's a giant chicken, I tell ya! A GIANT CHICKEN!" while the storyline takes viewers through a hallway at the Warner Brother's studios.
Chicken Boo, what's the matter with you?
You don't act like the other chickens do!
You wear a disguise to look like human guys
But you're not a man; you're a chicken, Boo!

Chicken Boo, what's the matter with you?
You don't act like the other chickens do!
He's jumbo-sized, and he wears a disguise,
But he's not a man; he is Chicken Boo!
by KikiriBoo March 22, 2013
Top Definition
Man-sized chicken from the Animaniacs cartoon.
You wear a disguise, you look like human guys, but you're not a man you're a chicken, Boo.
by Anonymous July 01, 2003
A sport created by three teens. While looking for a dock to go crabbing off Steve, Mike, and Brendan decided to try and catch each other with a raw chicken leg on a fishing line.

The rules:
The fisher man casts his line at the "fish" in order to hit them with the chicken. If/When the "fish" gets hit by the chicken the fisher man gets a point. 5 poins and then a switch of the fisher man. If the "fish" gets hit by theline he/she must stand still for 15 seconds. All new players must buy the chicken.
Hey man lets go back to the train station and hit up some Chicken Boo.
by steve September 12, 2004
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