F.D.L.B.
A human who is huge, clueless, slothful, and never stops cussing.
My mom is an F. D. L. B. She yelled at the internet for not working and then took two naps.
My uncle is an F. D. L. B. He told the whole restaurant he was hungry and ordered 10 burgers.
My dog is an F. D. L. B. He chased his tail for 20 minutes and then fell asleep on my face.