The phrase comes from Cebollitas, the Argentine television series about a youth football team, where Que bolu was used as a playful, shortened form of teasing slang. As clips from the show circulated online, the repeated line was lifted out of its original scene and shared as a standalone reaction sound on soundboards and in short videos. Its short length and instantly recognisable teasing delivery have kept it in use for lighthearted mockery, especially among Spanish-speaking audiences familiar with the show.