1. a smartass/know it all who think they're cool when they're really pathetic

2. someone who behaves in a retarded/stupid manner
rachel: hey dude have you seen AJ today?
meg: yeah man, he was pissing me off. he's such a rainbow kid.
by racheldiskord March 31, 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
Top Definition
A hippie like kid who goes to Rainbow gatherings and who usually does not have a home but has a van and usually panhandles for money or sells drugs. A rainbow kid usually hasn't bathed, wears no shoes, and has long hair/dreadlocks.
Q:What's the difference between a rainbow kid and a Phish kid?
A;A phish kid won't pick up a hitchiker because the car is too full of drugs. The rainbow kid is looking for drugs.
by Newt September 27, 2004

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