stm means short term memory

jack : i forgot yersterday the jokes you told me
ben : you stm is it?
de lianms 12 avril 2009
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
de Mandeep 17 juin 2007
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!
de SiERRAAAAAAAAAAAAAA 2 février 2008
Secret Tumblr Message from one blog to another. It's cryptic and personal. It's specific to the mini blogging site
STM: I saw what you did there.
de KarsonK 2 août 2011
Sexually Transmitted Miracle

or and unwanted baby.
You're a STM
de Miow_epicness 21 juillet 2010
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
de kaygem 5 octobre 2008
"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?"
de Stabber of loughshinny 4 juillet 2009

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