A substitution for the phrase: "That's what she said". Often used when in "mixed" company and/or public places when saying "That's what she said" would be considered inappropriate.
Setting: Family Dinner with Grandparents
Brother 1: Man, I've sure gotta pack this meat in (In reference to unfinished steak).
Brother 2: BOOMSCOOTER!
Other Family Members: *Confused, yet not offended*
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?"