A naughty astronaut that explores the vast depths of one's ass.
A faggot.
For another definition of Anal Astronaught, please see booty pirate.
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When a man sticks a condom over his head, and into a woman's vagina when on her period and then pulls it out and blows, inflating the condom, now covered with blood.
"Damn, that girl's pussy was so loose and I could easily do a bloody astronaught with her."
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The proper form for Astronauts in space.
They were "astronaughting" their way around mars.