Classic internet jargin which is usually more appropriate than lol, for if you were to laugh out loud at everyhing slightly amusing on the internet you would not only be a fool but you would hurt your jaw. Anyway, STMS simple means Smile to Myself
by MrDanger January 11, 2005
Get the STMSmug. 
Used on Snapchat , normally on lines or shoutouts. Normally means ‘Should Talk More’ but is also an abreviation for ‘Sent To Most’.
by RoisinSamuel November 9, 2017
Get the STMmug. A term coined by university students to express a desire for a sweet something after a meal, and therefore succumbing to the STM. Often referred to as a “sweet treat”. (Not to be mistaken for “Smiling To Myself”).
“Oooh I’m kinda feeling like a sweet treat”.
“Oooh I’m kinda feeling like a sweet treat”.
by Isabel Yums January 21, 2023
Get the STMmug. Smiling To Myself
To use instead of lol when you actually are not lol-ing and just smiling to yourself.
To use instead of lol when you actually are not lol-ing and just smiling to yourself.
by Mandeep July 15, 2007
Get the STMmug. sent to most
by dragemdragon April 23, 2017
Get the stmmug.