to suddenly stop, to fail at the last minute, to cancel plans for other reasons.
I thought we had plans Thursday, why did you jam out on me? I was following to closly to the car infront of me when her breaks jammed out; I couldn't stop in time. The drill press at the factory has jammed out again; coffee break time.
by Grjohnstone October 09, 2006

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The Urban Dictionary Mug

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The Urban Dictionary T-Shirt

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Top Definition
jam out: verb; means to relax, unwind, rest, chill out, etc, etc.
Pimp: Ey man, whats good? Where all da hunnies at?

Playa: Aint nothin poppin forreal, its cold so Imma stay my ass at home and jam out.

Pimp: hahaa yea its cold as a muthafuc*a aint it? Imma make da hunnies come to me, ya feel me? aight, man 1.

Playa: Aight B, 1.
by thisonechick February 16, 2006

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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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.

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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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To commence to do something. Usually in an excited manner.
" i jam out then commence to bust the skeet-wave."

guy 1: hey man, what you bout to do?
guy 2: Man!, i'm bout to jam out on this new game I got.
guy 1: word?! I'll come too!
by Sir Nise May 03, 2006

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