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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.
STM by someguy2012 November 9, 2011
Related Words
STM- said to much. When you go overboard while your texting and couldn't be bothered to go back and delete it.
Currently sitting on the toilet waiting on last nights Taco Bell to arrive oh god STM !
STM by Honey jones November 13, 2016
stm stands for 'smile to myself'.
this is opposed to lol, 'laugh out loud'.
'cause who actually laughs out loud when they type it?


right, no one.
stm = the new lol.
kaye: 'did you watch the powerpuff girls last night?'
riyad: 'yeah, it was funny as. stm.'
kaye: 'stm.'
stm by Kayeeeee January 19, 2009
Evil power-hungry, strike happy people who derive pleasure from providing mediocre transit service, shabby customer service, and squeezing as many people into a bus (at least 100) as they can (Routes 80, 139, 505, 535). www.stm.info
Damn it! I missed the 139 again! The next one is gonna be jam-packed, and it's gonna take me 30 minutes before I get to the Metro! And then the Metro is gonna be jammed! DAMN YOU STM!!!
STM by pseudonym April 27, 2004
refering to the graffiti clique "Stop The Madness".orginating form the BAY AREA!!
Dude1:hey,look at that cool tag
Dude2:yup,STM did that
STM by JESUSLIVES!!!!!! April 2, 2009
STM is slang for smiling to myself and is very similar to abbreviations like LOL (laugh out loud) and FTW (For The Win)It is one of the fastest growingly used words and next year will be added in the English dictionary.

Oh, and it is often mistaken for STI or STD (sexually transmitted infection/disease)
Nat.: Oh, remember that time with that teddy bear
Jess: Haha! STM :)
STM by berackk July 26, 2011