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
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

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