Top Definition
When you want to subtly tell someone to look behind themselves, you tell them to check their "6 o'clock".
When you're trying to tell someone to look at someone behind someone behind them, you say "check your sixty-six".
"Bro, check your sixty-six."
(he looks behind himself)
"Meh, I'm not into blondes."
"I said sixty-six. The girl behind the blonde is a redhead."
by supereboy August 03, 2014

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Originally appearing in The Complete Sex Dictionary (1969), the "back door" cousin of sixty-nine, sixty-six is a euphemism for anal sex.
"Okay, clue in me in. How'd it go last night?" (Snicker, snicker).
"It was the usual fanfare: we sixty-nined for a while, did the nasty, but ended up in a sixty-six."
"Lucky dog. She really MUST love you."
by Zane327 December 16, 2011

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

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

Buy the t-shirt