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H.m.u is short for "Hit me up" otherwise, "I've got nothing to do you should invite me to do something with you"
by Alexaa13 November 08, 2010
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It is abbreviation for "Hit Me Up".

It means that you want that somebody calls you or texts you an SMS.

Also, this was the most popular Facebook status in 2010. year - 1,600 statuses a day had "hmu" inside of them.
by Mr. Fancyhead January 15, 2011
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... the shortening for hit me up...
HMU IF YOU LIKE ME!

^ What the fuck? O-o Why don't you just SEND THEM A FUCKING MESSAGE YOU DUMB ASSES!
by Black Ninja! September 26, 2011
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