The slang phrase "clock it" means to notice, recognize, or realize something quickly or intuitively. It is often used when someone suddenly understands or observes something important or calls out a hidden truth or someone's real motive in a playful or knowing way. The term originated in British slang meaning to spot or catch sight of something and has roots in drag and ballroom culture, where "to clock" someone meant to notice something about them that might not be obvious. It has evolved to be widely used among Gen Z and Gen Alpha to acknowledge or call out truths, sometimes accompanied by a hand gesture tapping the thumb and middle finger together. In summary, "clock it" means to quickly see, notice, or call out something, especially a truth or something noteworthy, often with a bit of sass or humor.