suffix
intimate or disdainful suffix
Attached to a person's name or the stem of an adjective describing them. Can express familiarity, affection, or mild contempt depending on context. Often used in casual, playful, or teasing speech.
太郎ちん、ちょっと来て。
Tarō-chin, come here a sec.
あの子、かわいちんだよね。
That kid is such a cutie, isn't she?