The phrase "clock it" means to call out or expose a hidden truth or someone's real motive in a playful or knowing way. It is often used when someone makes a remark that reveals an unspoken reality or is particularly accurate. The expression is frequently accompanied by a hand gesture where the middle or index finger taps the thumb in a sassy manner. The term originated from drag and ballroom culture, where "to clock" someone meant to notice something about them that might be hidden, especially during a playful but sharp callout. Today, "clock it" is popular among Gen Z and Gen Alpha, partly due to social media and reality TV influences, and is used as a casual way to highlight something funny, accurate, or quietly savage.

The gesture and phrase have become common in everyday conversations among younger people to show observational skills or social awareness. It is similar in use to sayings like "duh" or "busted." While mostly harmless and playful, context matters, especially if used to bully or mock others.