when someone has to fart and another person puts a bag around their head completely surronding it, then they cut a hole for the mouth to breathe. the participant opens their mouth and puts their face right next to his/her's ass and sucks in the fart as they blow it out resulting in the "spaceman".
That was a gross space man, dude!
by Zirch<+>World February 05, 2007
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An elaborate sexual maneuver; simply defecate into a air tight bag and place it over your partners head allowing minimal room for them to breathe, commence coitus from the rear, either hole is fine. Then in the last few seconds before climax remove the bag swiftly from your partners head leaving them gasping for air and likely tightening the vaginal / rectal cavities ensuring maximum enjoyment.
"I paid this prostitute an extra $50 last night to do the chocolate space man, I forgot the pull the bag off her head though and now I don't know where to bury her"
by Billy Billy no mates October 03, 2017
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While a girl is laying naked at the edge of a bed, a man does a hand stand facing the bed, and enters her vagina with his cock.
Dude, I totally pulled of the Reverse Space Man last night!
No way! Didn't you pass out or anything?
by Steele Bro's March 05, 2008
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When a women is on her head Naked vagina up and wide on her bed. you jump off your headboard like a Horny spaceman on a sex drive mission "Head first" Aka Penis First.
my gf was vagina first. So i drove her hard thats how she likes it. space man sex Drive baby!!!
by nick j john September 19, 2009
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An amount of space between two men given to maintain their feeling/appearance of Heterosexuality. An extra seat or space between two men.
"John was such a damn idiot, he totally violated the man space by sitting right next to me!"
by Parabellum March 03, 2007
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