Yo mom's so fat that she wakes up on both sides of the bed.
Yo Momma So Fat
Explanation
Explain Bear
Listen up, buttercup. This "yo momma" joke is all about exaggeration, see? It's sayin' yo momma so dang big, she takes up the whole freakin' bed! You probably didn't know this, but beds only have two sides, just like your two brain cells.