a textual acronym used to abbreviate "laughing out loud to my self"
(used mostly in reference to seeing a funny text or picture that makes you want to laugh out loud and you are either alone or the people around you don't see it or think its funny)
(usually very embarrassing if you are alone in a public place)
Chris: Bro the pic of Jimmy vomming on Lisa made me loltms in the elevator.
Eric: Nice! How embarrassing though.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"