Abbreviation for "dick in your mouth". Sometimes used as a quick way of smiting your enemies. Has other incarnations such as dimm - dick in my mouth, diya - dick in your ass, etc etc.

Came into use in an IRC chat room and quickly took off from there.
<Person S> Hi there!
<Person A> Hi!
<Person S> DIYM!
<Person A> :|
โดย Eggulocity 31 สิงหาคม 2004
Swedish Writer
Diym was bombin and terrorizin the jam like troops in Pakistan
โดย Mads Ecks 13 มิถุนายน 2010
D- dick

I- in
Y-your

M- mouth
Brittney Spears,"5+5= 11."
Micheal Jordan," You fucking dummy, are you dumb it is 10."
Britteny Spears," Oh shit it is."
Micheal Jordan,"DIYM."
โดย LAjay14 05 กรกฎาคม 2011
This abbreveation for "Dick in your mouth", is also used as a word to replace damn in sentences to people you have no respect for, but maintaining it's "dick in ya mouth" meaning.

Contrary to the chat room deffinition, this term was developed by a friend and myself over fifteen years ago, as a way to fuck with a guy at work who we had named "Dicknyamouf". Example. "Hey dicknyamouf, bring me a soda!"
"Diym nigga you gonna smoke the whole shit or what?"
โดย Dj Puck 13 ตุลาคม 2004

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