Top Definition
Keefer is an adjective denoting high-quality. It is frequently used to decribe marijuana but can be used in other contexts as well.
Hey man, this weed is totally keefer.

Yo Caretto, that movie was pretty keefer.
by Lynchmob44 October 18, 2006

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A man/boy immersed in the party/drinking/weed-smoking atmosphere of highschool or college life who attends all of the parties and yet never touches any sort of drug, be it alcohol, weed, pills, etc.
-Joe! Quit being such a Keefer and take a hit off of this steamroller!

-Hey Keefer grow a pair and keg stand this shit!
by SpecialD January 17, 2009

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A guy who will flirt with anything with a vagina, but who will never make any effort to have more of a relationship than that.
1: Have you talked to that guy over there?

2: Yea, but he's a total keefer.
by DiabetesDominatrix February 20, 2011

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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.

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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.

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The Urban Dictionary T-Shirt

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To hit an almost impossible, seemingly random, showstopper shot that devastates, destroys, demolishes, and demoralizes the opposition.
I keefers'd that chump kid in banana.
by holl@holl@ July 10, 2008

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

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A really cool black person.
yo Samuel L Jackson is a straight up Keefer!
by blastingdrummer June 19, 2009

The Urban Dictionary Mug

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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.

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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