Top Definition
It means to slow down, control your excitement (see hold your horses)
Cool your jets, your order will be ready in an hour.
by Bob L March 30, 2004

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Relax.

Calm down.

Don't get excited.
Just in case you UD kiddies forgot, this is virtual reality. Things aren't always what they seem. There are trolls everywhere; including the UD admins that love to toy with you because they have your basic information acquired from your email and IP address. Are you assuming the worst in your BFs, GFs, or BFFs? If so, cool your jets. When there's a nerd that you love to hate because you assume they stabbed you in the back (and the front), think again. They might actually be a true friend that's tried their damnest to have your back (to no avail), but since there's life outside of the internet, stuff slips through the cracks. Have mercy! :D
by walking on eggshells October 10, 2013

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.

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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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Swing dancing term used by vintage life-stylists to mean be calm or settle down
Jeez, cool your jets, it's not that big a deal.
by $ally August 04, 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