What does hmu stand for in text lingo?
When used in a text message, instant message, etc, HMU is popular lingo for Hit Me Up, meaning a request to communicate back in some way, generally in the same way the original message came.
In 2010 FaceBook named "HMU" as the number one status update trend for the year.
It can also mean a variety of other things, such as Hydro-mechanical metering unit, helmet mounted unit, height monitoring unit, host manifest upload (in the UPS), hydrogen manufacturing unit, helicopter maintenance unit, height measuring unit (in aircraft), Hanoi Medical University, hydromechanical unit, Harlan Municipal Utilities (in Harlan, IA), and hair/makeup in film production.