HMU is the abbreviation for “hit me up.” It’s a quick way to tell someone to contact you or make plans in the future.
For example, you might say to a friend, “HMU when you want to play Mario Kart,” or, “HMU when you get back in town.” In most cases, HMU is used in social or informal business circles.
Some people also use HMU to convey that someone asked them for something, such as, “He HMU asking for money,” or, “She HMU for a date.” This usage aligns with the definition of “hit up,” which is common real-world slang for someone asking you for something.
It’s worth mentioning that “hit up” can also mean you want to go to a certain place. For example, you and your friends could “hit up” the Trader Joe’s. Of course, this usage doesn’t have an abbreviation, so back to the topic at hand.