1. Person 1: You Do Know?
Person 2: SMML
Person 1: What Does SMML mean?
Person 2: Super my Mario Logan
Person 1: Oh.
2. Joe: Well there’s nothing I can do…
Jake: Well SMML.
Joe: What does that mean?
Jake: Super my Mario Logan
Joe: SML???
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?"