a man who gets with girls and cheats on them or only gets with them for sex. a man who has multiple partners at one time.
Aarron Hoff is a man slag because he cheats on people
by ldedfncwleJUCBDFDV December 12, 2010
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A man who has spreaded his seed amongst plenty of women (has sexual intercourse with alot of women, but mainly ugly or fat ones)
Erics such a man slag, he shagged 4 women in a day, in fact one of them was my sister!
by JJCG November 13, 2007
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A man who tries his very best to sleep with the majority of his year group at high school, including the guys.
Guy 1 "Hey man I think im guna ask that girl out over there"

Guy 2 "nah dont waste your time, girls suck ass, try guys....they are tighter than 18 yr old women"

Guy 1 "u f*ckin Man Slag, lol."
by Ace_of_Wales February 15, 2006
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Tyler cut things off with one person then went to her best mate that makes him a man slag
by Mhmhoe November 8, 2018
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someone who asks everyone out despite the high chance of rejection. someone who doesn't think of someone else's feelings when maybe cheating on them or dumping them and especially when arguing..
oh, and who is a man:)
josh: will you go out with me?
Seth: no
josh: will you go out with me?
Aimee: no
josh will you go out with me?
Bekka: no
josh: will you go out with me?
Holly: yes
josh: (whilst going out with holly) seth will you go ot the prom with me?
Seth: no
seth + hannah: he's such a man slag!
by WarbleHarvey May 17, 2012
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Fuck around girls and breaks there heart
A man slag is usually named CAL
by Katiescott44 November 15, 2019
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A 14 year old who likes potatoes and gets wanked off In a field after breaking up with his girfriend
Boy; hi wank me off I've just ate a potatoe and broke up with my girlfriend I'm a man slag!
by Potatoe muncher May 28, 2017
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