Top Definition
It's when you place a plastic bag on you head and you masturbate and try to finish out before you pass out.
I was bored the other day and had some leftover Walmart bag so I astrobated.
by bigfatcody420 September 08, 2016
The action of performing masterbation in the outer reaches of space.
when i left on the apollo 18 mission, i became lonely and had to astrobate.
by professor jackhoff March 16, 2011
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