A word small children use in place of the word "ass"
God, he is such an jack astronaut sometimes.
by Gerbilweebies February 25, 2005

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One who insists on driving despite being too high to walk.
"Dominick says he can drive to McDonald's, but I just saw that astronaut motherfucka take a BIG-ASS bing hit!"
by Darryl X. July 08, 2003

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To be an astronaut is to be very very high on cannabis.
Ha! look at that astronaut!
by jimbobsy macgregor February 16, 2011

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When a fine stoner places a bag over their head and sticks a joint smoker into the bottom filling it with smoke.
Logical Person: Why does he have a bag over his head, he might suffocate!

Stoner: He's doing an astronaut, your supposed to suffocate.
by NonsenseNinja November 21, 2015

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Cosmic cock blockery abound, these space exploring bastards are known for ruining any chance you have of looking cool at a "Roll Party" (A social gathering in which Ecstasy is consumed)
"Who the fuck invited that Astronaut? What the fuck part of NO FUCKING ASTRONAUTS didn't you understand Todd?!"
by Adrian Tsubota January 22, 2008

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Among the common definitions, one who partakes of DXM (the cough-suppressant found in Robitussin and knockoffs) often. A reference to the phrase 'Going to the Moon'
God, he doesnt drink or smoke, but with all the tussin he gulps he's a regular astronaut.
by Dr. Rick February 04, 2009

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Someone who is amazing in bed (sex).
God, that man is an astronaut!
by Jaline January 28, 2005

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A sexual position where the girl is hanging upside with those space boots ,that the astronauts use to sleep and what not, while hanging upside down she is giving you head and you are wearing a space helm and right when you brick you scream at the top of your lungs "blast off!"
Me: Last night i astronaut ed my girlfriend
You: Oh? how was that?
Me: It was terrific, i was wearing a space helmet.
by Tune It October 09, 2007

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