Top Definition
ISR
In School Restriction. This is when you are held in a classroom apart from other students for one class period. Your teacher will often send work for you to do. Like ISS but not for as long of a time.
My friend had ISR during math because he was playing on his iPod yesterday.
by CatChick February 17, 2010

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ISR
Illegal Street Racing
"yo, you cats down for some ISR?"
by Rich B August 30, 2006

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ISR
Girl and boy school located in Monterrey, Mexico. Boys show their boxers and more; since they like the feeling of the air through their ass. Girls use slutty short skirts while pretending to be holy and spoiled daddy's little girl.
Boy: Woah, nice skirt! I wonder what's underneath it babe
Girl: Well, keep wondering becuase you're never gonna know asshole.
Boy: Damn, I sure as hell want that bitch
Boy 2: Well man, keep dreaming because she's from ISR
by NILS321 June 13, 2011

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Isr
A ISR is an In School Relationship. Strictly a relationship where is taken place in school, usually consists of the grades 4-8. These types of relationships, do not go on dates, do not kiss, or anything of that real couples do.
I dated a Connor a year ago, but it was a isr so it didn't really count as dating.
by im December 18, 2016

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Lotsa space for your liquids.

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The Urban Dictionary 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

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

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