attention seeker; look-at-me person
Colloquial, often mildly derogatory term for someone who constantly seeks attention or validation, especially on social media or in group settings. Derived from 構って (te-form of 構う, 'to care about') + 君 (familiar suffix).
He's always posting attention-seeking stuff on social media.
That kid is an attention seeker, so just ignore him.
Standard kanji-kana spelling; 構って is the te-form of 構う (to care about) and 君 is a familiar suffix for a person.
Kana spelling is common in casual writing, especially online.
Compound of 構って (te-form of 構う, 'to care about') + 君 (familiar suffix for a person). The term likely originated in online communities to describe people who constantly seek attention.