What is HMU mean?
HMU is popular text lingo for Hit Me Up, meaning a request to communicate back in some way. The individual who sent you the HMU message wants you to get back to them, usually the same way they sent you the message (SMS text, Email, or Instant Message).
In 2010 FaceBook named "HMU" as the top status update trend of the year.
The acronym HMU can also represent: Hanoi Medical University, hydromechanical unit, height monitoring unit, Harlan Municipal Utilities (in Harlan, IA), hydrogen manufacturing unit, hair/makeup in film production, helmet mounted unit, host manifest upload (in the UPS), Hydro-mechanical metering unit, height measuring unit (in aircraft), and helicopter maintenance unit.