Top Definition
The phrase used when someone does something that most people don't agree with; socially unacceptable; politically incorrect.

This phrase cannot be used in reference to dill pickles, because I'm pretty sure those are always kosher.
Jack: John, are you stealing those little kids' lunch money again? You're like 40 man you need to stop that.

John: (Looks down at his feet with shame)

Jack: Not kosher man, not kosher at all
by Andy Hesterman December 28, 2007

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The noble founder of ontd_anas
Not Kosher: Don't forget to douche!
Aurosan: Douching is bad for you!
by notkoshersbigfan December 20, 2007

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

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