A GOD A WOMEN OF POWER HARLRY FRICKIN QUINN AWSOME AMAZING WONDERFUL WOMEN PERFECT AND HER HYENA IS SO CUTE BRUCE
by HarleyFRICKINQUINN September 26, 2020
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Another term for a "Mary Sue", stemming from Batman the Animated Series, in which Harley Quinn was an obvious Mary Sue created by Paul Dini to sublimate his sexual desire for the Joker and to make "the Joker appear less gay".

Any character created or written into fan fiction, that clearly does not belong, but is there to sublimate the authors sexual desire for an actual well established character.

Most OCs
Fan girl: Did you read my fan fiction featuring my OC, who's Riddler's girfriend?!!!

Me: I don't need to read about your Harley Quinn.
by JosephKerr February 10, 2012
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Annoying as heck / jokers girlfriend who gets abused instead of loved by the joker.
Harley Quinn is soooooooo annoying
by Megatron prime November 14, 2019
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Harley Quinn is a beautiful amazing fictional character who has been through shit but recovers like a badass. She was an orphan and abused as a child. She grows up to be a psychiatrist and one of her patients (the joker) seduces her and she becomes his lover and criminal sidekick. He treats her really badly but eventually she becomes independent and doesnโ€™t deal with his bullshit anymore. Overall, sheโ€™s a badass, beautiful, rebellious, quirky, gorgeous girl. ๐Ÿ’™๐Ÿ–คโค๏ธ
โ€œWhoโ€™s that pretty girl from on the TV fighting off police like a badass?โ€

โ€œThatโ€™s Harley Quinn. Life would be so much better if she was a real person.โ€
by Gangster Katniss May 5, 2020
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It's when a female (or male or any gender, I dont care) want to be like Harley Quinn from the movie Suicide Squad and praising the "loving relationship" of Joker and Harley and ignore any who said that Joker is supposed to be a abusive boyfriend.
Wannabe:OH MY GOD!!!!!! relationship goals!!!!!! I wanna have a boyfriend like joker.
Comic Expert:You know that they cut the real scenes of Harley and Joker relationship , cause they want sell does merchandise on Hot Topic.
Wannabe:SHUT THE FUCK UP HATERRRR!!!!!! YOU DON'T KNOW SHIT ABOUT HARLEY AND JOKER YOU CUNT!!!!!!!
Comic Expert:ok..... Harley Quinn Wannabe
by Jesus christ it's Jason Bourne September 3, 2016
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Harley Quinn Syndrome (HQS) is a mental disorder created by none other than Deniz Dogan. Research on this disorder by Deniz Dogan is shown below:

5 Stages of Harley Quinn Syndrome

Stage 1 // Prologue ๐Ÿ“–๐Ÿค“๐Ÿ“š
the victim starts developing normal feelings

Stage 2 // Breakup ๐Ÿ’”๐Ÿ˜”๐Ÿ”ฅ
the relationship goes sour and starts to die โ˜ ๏ธ

Stage 3 // Devour ๐Ÿ‘น๐Ÿ˜ˆ
the victim is really obsessed with the person that they love

Stage 4 // Revelation โœ๏ธ๐Ÿ“™

the victim slowly starts to have a crisis over the offender

Stage 5 // Endgame ๐Ÿ‡๐Ÿ˜ˆ๐Ÿ’œ
the victim slowly starts to realize that the person they love is not the person they thought they loved so feelings start to break down

(jess please come back don't leave me i promise im a nice guy)
Jessica was patient zero of Harley Quinn Syndrome.
by denizdogan February 21, 2022
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when someone has an unhealthy relationship/attachment to another who is not good for them
kevin- bro did you see kyle still obsessing over stephany ?
clint- nah bro ,kyle got that harley quinn syndrome
by hgmonster September 23, 2020
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