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A girl who sleeps around with guys with girlfriends, because she gets off to the thought of being used.

She likes to believe that, even though he's cheating on his current girlfriend for her, that he'd never screw her over.

The other girl is commonly written off as slut or whore by those who misunderstand her, when really, she just has a drafty vagina needs to be kept filled.
Congratulations!
You're.... THE OTHER GIRL.
You're okay with letting yourself get used by a guy with a girl friend!
Don't worry, he loves you, and he'll eventually be with you, when his girlfriend dumps him.
Until then, he'll have you on a string, but that's alright, because you're okay with being used for sex because you like feeling wanted.
by napoo February 15, 2010
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2
basically it means the other girl your boy has been fuckin around with
kels - who the hell is she!!?
dylan - well she's my other girlfriend kinda sorta
the other girl - wtf dylan!!! ( slaps him ) it's over
by jklhrlqkewjhr July 30, 2008
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3
The other girl is who gets little to no attention and constantly feels out-shined. They usually have very low self esteem and constantly feel threatened by girls with higher self confidence.
Every time we go out I'm always the other girl.
I'm not the other girl, you just think your better then me.
The other girl mentality is what's making you unattractive.
via giphy
by Pink Cool Whip March 18, 2017
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