Arsetranout 

This refers to a derogatory reference to a homosexual male individual....but its funny...hehehe

Man if i didnt know any better that guy looking at that other guy's ass is an arsetranout

Arsetranout by HateChavs July 11, 2005

Arsetronaut 

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

Arsetronaut by Scoundrel June 27, 2004

Arsetronaut 

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!

Arsetronaut by theanglingaddict February 24, 2015