1) A big guy that resembles Santa in a way except that he's a little crazy and doesn't own reindeer.2) A slang term for something that is completely crazy and insignifigant.
YO! Grizzle! Did you see Santa, I mean Uncle Bill at the mall? Man, I know you'll look like him in a couple of years.
by Heatmaker January 08, 2004

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Top Definition
A term of endearment and high respect for the author William S. Burroughs
Uncle Bill once said, "The only time Richard Nixon ever told the truth was when he called J Edgar Hoover a cocksucker!"
by NakedLunchMunch June 25, 2005

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Alcoholic Beverage dedicated to Uncle Bill from the film "American Movie"

Peppermint Schnapps, Sprite and ice... two great gobs of it.
Mark: You thirsty? Want something to drink?
Bill: Yeah...schnapps...with sprite, and ice...two great gobs of it.
Mark: Alright, Uncle Bill.
by jolivas February 16, 2010

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Creepy Family member most likely to molest anyone he can. The funny Uncle nobody trusts. The uncle who Volunteers to play Santa. May or may not be obsessed with Sean Connery. A "Billy".
"Even Though Uncle Bill had a lean swimmer's body, Lex HATED sitting on his lap"
by @ Pope Pesci XVII October 18, 2013

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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