Top Definition
When two separate aspects or relationships in a persons life collide: your friends (one "world") become friends with your girlfriend (a separate "world").

Popularized by The Seinfeld episode "the pool guy", in which Georges Costanzas' girlfriend forms her own friendship with Georges' platonic friend Elaine (Causing Georges' worlds to collide).
Kramer: 'Jerry, don't you see? This world here, this is George's sanctuary. If Susan comes into contact with this world, his world's collide. You know what happens then?'

<Kramer puts his hands together and makes explosion sounds that exemplify what happens when there are worlds colliding>

KRAMER: 'Ka shha shha shha Pkooo!'
โดย Donjulio78 30 ตุลาคม 2009

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When a good friend of yours becomes good friends with another good friend of yours.
Mike: My good friend Chris met my good friend Devlin today, and they liked each other!

Kathy: Worlds colliding!
โดย Mike Cirelli 22 พฤศจิกายน 2009

The Urban Dictionary Mug

Lotsa space for your liquids.

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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
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