Definition of «landmine»

"Landmine" is a slang term used in internet subcultures to describe an emotionally volatile or unpredictably explosive individual who may seem harmless or quiet until triggered. Borrowed conceptually from psychological tropes and Japanese subcultural terminology, the word evokes the danger of stepping on something hidden that detonates without warning. It is often used self-referentially or descriptively on social media to express volatile mood swings, extreme emotional sensitivity, or sudden angry outbursts. The tone ranges from self-deprecating humor to genuine warning about someone's unpredictable temperament.