noun
A slang term for a person, typically a woman, who is overly possessive or jealous in a romantic relationship, often exhibiting controlling or manipulative behavior.
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The woman was labeled a 'bunny boiler' after she was caught stalking her ex-boyfriend.
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I heard she's a real bunny boiler, always checking up on her ex's social media.
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She's such a bunny boiler, she's always causing drama in relationships.
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Her jealousy and possessiveness made her the ultimate bunny boiler in their relationship.