A derogatory Japanese slang term for obnoxious liberal or leftist Americans used by America loving J-Boys and media personalities. It's used to describe SJWs, race baiters, LGBT activist, CCP pandering weaklings and cancel culture advocates resembling leftist stereotypes from Seattle.
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?"