noun. A female naturally skilled and trained during childhood in the art of being an unreasonably sassy drama queen and self-entitled. Sasstronauts will often evade responsibility for their own dramatic actions that were caused by their unreasonable sassiness.
Alysin pissed off every one of her coworkers by being an unbearably cunty sasstronaut.
by King Bowl April 05, 2013

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Top Definition
A person who is being exceptionally sassy, and maybe beginning to get an attitude but you don't want to hit in the face because they're your friend.
Friend A is being bitchy. Friend B, "dude, why are you being such a sasstronaut?"
by ecg87 June 03, 2011

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.

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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

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt