What it means
ギュン is an emphatic reaction to a sudden rush of attraction or affection: a cute expression, kind gesture, or favorite’s photo makes your heart jump. It is often described as a stronger, more startling version of キュン. It names your reaction in the moment, while メロい more often describes the person, performance, or quality that has you swooning.
How to use it
Use it casually as ギュン, ギュンきた, or ギュンです after a moment that makes your heart leap. It often appears in fan talk and comments about someone’s look or gesture. The wording is playful and high-energy, not a neutral word for liking someone; in formal conversation, say ときめいた or 心を動かされた instead.
Examples in conversation
Where it comes from
Recent youth-language guides describe ギュン as an intensified キュン: changing the initial consonant to a voiced sound gives the reaction a stronger, more playful impact. A 2026 若者研究所 article and MERY both connect its visibility with the phrase 「ギュンギュン好きすぎて滅」 around M!LK’s song, but the precise first coinage is not established. Treat it as a contemporary usage pattern rather than a word with one proven inventor.
Related slang
Further reading
We use references to check meaning and background. Examples on this page are original.