Someone who is clingy and jealous to their most pathological extremes, leading to criminal acts such as stalking, kidnapping, maiming, or murder (of you and/or their perceived rivals for your love).
"Yandere" is a combination of two Japanese terms: "yanderu” (to be sick), and "dere-dere” (to be lovey-dovey). The yandere is a popular character trope in anime.
by IntrospectiveLiz March 10, 2021
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A term for a person who is loving and caring to someone they like until their love, admiration and devotion becomes feisty and mentally destructive in nature through over protectiveness, violence, brutality or all three combined. Yandere is mentally unstable and uses extreme violence or brutality as an outlet for their emotions.

Simply put, a yandere is lovesick; someone who has been driven to insanity by extreme obsession or love, thus resulting in abnormal behaviour if not violence. Take the tropes "Love Makes You Crazy", "Love Makes You Evil", "Love Hungry" and "Stalker with a Crush", turn them all up to eleven, and condense everything into a singular personified character archetype

Types of yanderes:

Mugai-gata
Harmless type

Kanchigai-gata
'Wrong idea' type

Shuuchaku-gata
Obsession type

Sutookaa-gata
Stalker type

Dokusen-gata
Monopoly type (most common one)

Ison-gata
Dependence type ('dependence' as in addiction)

Touei-gata
Projection type

Shoushitsu-gata
Disappearence type

Shuumatsu-gata
Final type ('final' as in 'the end')

DV-gata
Domestic violence type

Sokubaku-gata
Restraints type

Mousou-gata
Delusion type

Jishou-gata
Self-harm type

Haijo-gata
Removal type

Shinjuu-gata
Double suicide
(I was quite surprised when i found out that Dazai from BSD is a yandere tho)

Jiko-gisei-gata
Self-sacrifice type

Suuhai-gata
Worship type

Choukyou-gata
Training type

Koritsu yuudou-gata
Loneliness induction type

Kyouki-gata
Bizarre-seeking type
Yandere: Come on, what's the problem? Just give me your heart! Gosh, she couldn't mean that much. Let me give you my love!
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A person who will go to near-extreme to extreme lengths to be in or deepen a desired relationship, weather it be romantic, platonic, familial, etc.
“Yeah, I would kill for my brother. Guess you could call me a yandere.”

“I think my ex is a yandere... I see him everywhere.”
by I_Put_The_PAN_In_Panic April 17, 2020
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Anime Slang. Pretty much someone who' in love with someone and they would kill anybody who would steal their crush.
"Touka, stop being a yandere!"
"Shut up, Kaneki!"
by Dipper_Pines_The_Brony April 12, 2016
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A portmanteau of two Japanese words. Yanderu, meaning to be sick. And deredere meaning an infatuation, moonstruck, head-over heals, or lovestruck.
Dude she is so a yandere for you.
by insanekittyharley January 28, 2017
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Noun - A person (typically a girl) who would use violent means to get their crush to love them.
"See that girl over there? She just killed 2 people to get him to love her. She's defenetly a yandere"
by ShxdyNeo September 11, 2018
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Yandere is a person who stalks their crush and if there is any competition they will go to extreme lengths to get rid of them.
Oh no they seem like a Yandere!
by my edits are bad December 26, 2018
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