A chad with a naturally good looking structure (such as a beard, thick eyebrows, a nice facial bone structure etc), but with a large amount of fat above it. They are decent looking even if fat, but become ridiculously good looking upon getting fit. Their personality is also similar to a chad.
Brad used to be a fatchad, now look at him. He's super good looking now!
What one calls a relatively fit person upon seeing them consume vast quantities of unhealthy food. Commonly used among college-age people, this nickname refers to being an obese person. Often associated with the freshman 15, sophomore 30, junior 45, and the most prestigious senior 60.
"Oh my god, another bowl of ice cream? Man, I can't wait for you to turn into a fat chad. It's going to be epic."
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?"