F.D.L.B.
A human who is chunky, brainless, slothful, and loves to talk trash.
My friend is an F. D. L. B. He said he was going to clean his room, but he just fell asleep on the floor.
My cousin is an F. D. L. B. She screamed at the phone for not ringing and then took a nap.
My little sister is an F. D. L. B. She drew on the wall with chocolate and then cried about it.