Top definition
A term used to decribe a homosexual male, ie butt pirate, poof, Starfish Trooper.
That guy who works behind the bar here is a fuckin arsetronaut
by Scoundrel June 27, 2004
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2
An arse of astronomical proportions
That guy is such an arsehole that he is out of this world. in fact, you can call him an arsetronaut!
by theanglingaddict February 24, 2015
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