This emoji holds a special meaning among K-pop fans. It's used to praise a favorite idol's dancing skills or great leg line, and is especially used to emphasize powerful choreography.

Beyond its literal meaning, it's also used as an exaggerated expression of emotion, like 'my legs are giving out' from laughing too hard or being deeply moved. In this way, teens and young adults often use body part emojis to cleverly express their feelings or specific fandom culture.