A Bag o' Beagles
When your butt is so big and wobbly it looks like it’s been stuffed with beagles and someone put a giant cupcake inside.
He looked like a bag of beagles that just got hit with a cupcake.
She looked like a bag of beagles that had a cupcake shoved in there.
He walked like a bag of beagles that had a giant cupcake for dessert.