A slagfish is a girl you physically want to slap like Neil slapping that poor likkle fish. She likes sucking all the little willys in the area and likes a good one up the bum every now and then. She also likes a bit of role play if it’s to do with wetness and sharks.
William: I was gonna meet Olivia today but she met her friend
Fabian: Is she the fit one
Harvey: Nah bro she’s the slagfish.
by 180DegreesToeNail May 31, 2020
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A fish who is promiscuous with both other fish and people. This term is used to insult those who you feel do not need a vicious insult but still require some level of insulting

Not an aggressive insult, more of a playful one
Omg he is such a slagfish for stealing my egg

OR

you are a slagfish Sarah....to which Sarah would reply thanks, love you too
by creativeminds May 9, 2011
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