Fat Bois is a term that you would use when you're at the store or your friends/your house and you see thicc ice cream treats such as ice cream sandwiches, popcicles, or cones.
Person 1: "Look at them fat bois!"
Person 2: "What..?"
Person 1: "The ice cream, the fat bois
He is usually over 700lbs and loves to play. With playing video games he takes them seriously. He rages a lot when he loses. He can’t handle healthy appetites. He is the type of guy that doesn’t do much outside.
Jamal: I can’t believe your inside on such a nice day!
Barack: My destiny is to become like fatboifredo.