An acronym for 'hot man underpants.'
"Hey guys, I just ordered some hmu off of ebay."

"Omg! Freddie is wearing hmu!
by Izzeh :D June 27, 2010
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A 3 letter acronym use in texts or on various personal ads referring to one male, who's receiving oral sex, is also holding and playing with another male's cock and genitalia thereby jacking him off (results in greater sexual pleasure to both partners or individuals).
Ad under m4m, t4m, mw4m or mw4mw can read in part: Love to give oral sex with my warm, wet lips, HMU accepted but not required.

Red: "Hey Bob, did you hear, Jim got a blowjob from Sally's husband and was told to HMU during."
Bob: "You're kidding Red, did he do it?"
Red: "From what I heard he did, got so turned on, ended up jacking him off."
Bob: "lol"
by benignlylauxes September 14, 2014
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to hit one up is to message/contact oneself upon their request
'hmu on snapchat?'
by pipwinch July 2, 2017
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Stands for Hit Me Up.
This word means "i'm bored so you should talk/chill with me".
A word generally used by fuckboys that have no purpose in life other than to convince a perfectly ordinary girl into sleeping with him.
Fuckboy: I'm bored bby, hmu
Girl: no stfu
by inclusivelilbish October 13, 2015
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