1) One who likes to perform the action of sticking one's finger up the anal cavity of another human being, usually being male,and/or ugly, as STM also denotes being a queer.
2) Can be used in conjunction with yayaya
1) So, STM I hear you anally fingered that queer guy!?!? STM....YAYA YOUR NOT GAY!
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
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!
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.
Sexually Transmitted Miracle
or and unwanted baby.
You're a STM
stm means short term memory
jack : i forgot yersterday the jokes you told me
ben : you stm is it?
Sexually Transmitted Marketing (STM). A viral marketing campaign that uses blatantly obvious sexual innuendo to spread itself across the internet and/or social networks, leaving victims of its tasteless imagery feeling almost as dirty as those who catch its biological counterpart (see STD).
Nadia: I think I caught an STM on Facebook yesterday, some new "NutLiquor" vodka that was "69 proof" and had "no salty aftertaste"
Marc: You should get that checked.
Standard Topless Makeout. The go to hookup situation for virgins, girls playing hard to get, Catholics, or conservative Protestants.
Dude 1: "Did you get any action last night with Kate after you left the party?"
Dude 2: "No more than an STM. She goes to church every Sunday and she may be trying to date me."