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.'
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