Your mama's so fat when she sat on the toilet, the toilet said, "A, B, C, D, E, F, G, get your fat ass off of me!"
Your Mama's So Fat
Explanation
Explain Bear
Listen up, buttercup! This joke is all about your mama being so wide that the toilet bowl straight-up sings the alphabet song, demanding she removes her hefty self. It's a roast! You probably smell bad. And you are probably stupid.