Top Definition
A political policy or program that sounds too good to be true because the money to fund it either does not exist or very shortly will not exist. The politician advocating such a program is shielded from this reality by the fact that he or she will be out of office and on the lecture circuit by the time the general public realizes that they have been hoodwinked.
Providing health insurance for 40 million currently uninsured Americans at no additional cost is utterly unsustainable. Sounds awesome, though.
by PBSPinchback June 30, 2010

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The sound a robot would create with a guitar if the robot was built by God under Matt Bellamy's close supervision.
Twighlighter: That sound is unsustainable dude, hope its in the next twilight film or I'll end up hating it.
by Pierre96178 October 17, 2012

The Urban Dictionary Mug

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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.

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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

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uhn-suh-stey-nuh-buh l

not sustainable; not to be supported, maintained, upheld, or corroborated.
Your way of life is unsustainable.
by PineappleJuice March 16, 2015

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.

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