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.”. Some people also use it to convey that someone asked them for something, such as, “He HMU asking for money”. This usage aligns with the definition of “hit up,” which is common real-world slang for someone asking you for something.The phrase “hit me up” is inseparable from ‘90s hip-hop culture. During that decade, many people (not just drug dealers) used one-way pagers to communicate with one another. “Hit up” grew out of the very specific rules of paging. Rappers used the phrase in hundreds of popular songs, and it started to have a variety of meanings. Now, the phrase is closely associated with cellphones, which are, arguably, the modern version of pagers.The history of our little abbreviation, HMU, isn’t nearly as interesting as all that. See, it came out of nowhere, and first appeared on Urban Dictionary in 2009 and totally exploded into popularity by the end of 2010.It’s easy to use and will be understood by most people. Therefore, you could say, “HMU when you get home”. Again, it’s a straightforward abbreviation, so you don’t have to worry about any weird grammar or anything. If you want to describe a situation in which a friend or acquaintance messaged you out of the blue, you could say, “He HMU just last week”. As with other informal internet abbreviations, you might see it in lowercase (hmu), as well.Can also mean “Hold my unicorn.”Member of quitethethingmedia.com Twitter: twitter.com/whatdoesSMHmean