Yo mamma so poor that when we went on a date, she took off her shoe laces and said "spaghetti."
Shoelace Spaghetti
Explanation
Explain Bear
Listen up, buttercup. This "yo mamma" joke is about how poor this dude's momma is. She's so poor that instead of ordering actual spaghetti on a date, she takes off her shoelaces and pretends they're spaghetti. This joke relies on making fun of the momma's poverty by using absurdity.