Descriptive of an otherwise MANLY man suffering a period of GIRLY behaviour when his manliness is challenged by other MANLY men... thus provoking the suspicion that he may not be very MANLY at all.
*At the gym*

"Hey AJ, why did Billy just punch the wall, throw the contents of his locker around the room, and run outta the room screaming?"

"I dunno Matty... all I said was that he was lookin' a little outta shape and should maybe work out a little harder"

"Wow!... I aint never seen Mansterics that bad before. Guess he must be on his Manstrual Cycle
by aaaaajon January 14, 2012
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half man, half monster = manster
That guy is a manster
by enken September 27, 2003
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a large, furry creature: part Man, part Monster
My furry Manster engulphed me in warm snuggles to keep out the cold.
by Sedona1 October 18, 2011
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A girl that ‘s physical form seems to be a combination of a man and a big foot, wolf man, frankinstein tipe monster
Drunky Jeff: Hay bro that chick is checking me out, she’s hot.

Shafty: dude you need to sober up that chick is a manster.
by Shafty McJonhson November 4, 2011
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a ugly, stupid, lying, cheating, manwhore guy.. only wants to get in your pants and will say anything his incomptent brain can think of to do so :)

One part Manning.. 99 parts Monster
"damn, i didn't know he was such a manster"
by greenpeppersteak November 5, 2011
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wANA manster
by emz September 10, 2003
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Chicks that are over 6 feet tall
Grace Jones is a manster!
by abstractj April 24, 2003
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