not kosher 

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

not kosher by Andy Hesterman January 10, 2008

not kosher 

The noble founder of ontd_anas

Not Kosher: Don't forget to douche!
Aurosan: Douching is bad for you!

not kosher by notkoshersbigfan January 8, 2008

That's Not Kosher 

A phrase, interchangeable with 'that's pork', normally used in reaction to unpleasant conversation.

#1: Man, I just took the most epic shite of my life, it proper stunk up the place.

#2: Jesus dude, that's not kosher.

That's Not Kosher by Tiggerback June 20, 2010