Another way of saying, "not cool" or "god damn lame." Usually used during a fit of rage brought on by a situation where one is pwn3d.
(When grandpa Vince is taking a massive poo)
Timmy: "Grandpa, there's no more toilet paper."
Grandpa Vince: "Not chill!!!"
by Oliver B. May 21, 2006

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Top Definition
When a person tries to control everything around them because they need to be the center of attention. No one likes them because they play people and just dig themselves into a hole. They also lure people in with false promises and lies then throw them away like garbage. Most people who are not chill are usually ousted from societies and end up running away to other parts of the country because they realize no one likes them.
Guy: Yo last night i was hangin out with this chick Amanda, u know her?
Guy 2: Duddeeeee Amanda is soooo not chill, no one likes her.
by CAdams123 November 22, 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.

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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