Top Definition
Arose out of such works as ass hat, ass clown, ass bandit, poo jabber and of course ass tronaut. A poostronaut is an insult for an ass hat or ass clown who will boldy go were no ass hat or ass clown has gone before!
1)"Dude, Dave is an ass clown..."
2)"No dude, Dave is a total poostranaut!!"
by Jimmy-jimmy February 17, 2005
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