Top definition
Smiling To Myself
To use instead of lol when you actually are not lol-ing and just smiling to yourself.
Msn Dude: Hey man, I lost my shoe today...
Msn Man: stm, you're a jackass
by Mandeep June 17, 2007
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The vengeful act of crapping on a lover's chest while they sleep.

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2
Secret Tumblr Message from one blog to another. It's cryptic and personal. It's specific to the Tumblr.com mini blogging site
STM: I saw what you did there.
by KarsonK August 02, 2011
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Soft and offensive. Just like you.

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3
Sexually Transmitted Miracle

or and unwanted baby.
by Miow_epicness July 21, 2010
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4
Stop Tailgating Me, a bumper sticker often found on vehicles of slow ass drivers. Seeing this bumper sticker makes you want to tailgate them even more than if they didn't have the sticker at all, basically it's superfluous.
Dude, that trucks got an STM sticker on it, let's tailgate 'em!
by SiERRAAAAAAAAAAAAAA February 02, 2008
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5
stm means short term memory

jack : i forgot yersterday the jokes you told me
ben : you stm is it?
by lianms April 12, 2009
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6
"Speak to me", Used as a greeting when answering your phone
Phone rings!

Daniel: "STM!"

John: "Hi Daniel, I was just ringing you to ask you if your going to the patch tonight?"
by Stabber of loughshinny July 04, 2009
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7
Smiling To Myself.
A more realistic saying for when someone says something funny over the internet as opposed to lol because no one is really laughing out laughing.
Gemma: I just fell down the stairs and broke my legs.
Kayleigh: STM
by kaygem October 05, 2008
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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