it can be used in many different context. Like oh flooop i dropped something would be like oh shit or oh fuck but not swear words or u could say oh you have pinkeye, that flooops would be like that sucks but teachers won’t yell at u. It’s basically just a replacement for a curse word that u could say around ur children, parents, or teachers!
Boy: *trips* oh no i dropped my lunch Girl: that must flooop
Girl 2: yeah that flooops for you
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?"