The kind of forehead that few people have because most people have small-ass foreheads. People who have them are often made fun of by dense failures of society who have nothing better to do with their free time and refuse to see their own (obvious) flaws.
This is a word to describe somebody whose forehead is massively large. It is commonly believed that their forehead is flat when actually it is so big that Ben is due to the gravitational force
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?"