The phrase is Indonesian slang, with gila meaning crazy and kamu meaning you, directed at someone named Reza. Short named callouts like this spread easily on TikTok and other short video platforms because the emotion is clear even without context. Creators reuse the clip as a ready-made reaction, letting the scolding tone do the work instead of recording their own line. Its specificity is part of the appeal, as viewers apply a personal callout to friends, characters and strangers who act in an exaggerated or foolish way online.