Yo Mama So Skinny

Listen up, you silly goose! This joke is all about how incredibly skinny "yo mama" is. Like, she's so thin that a single piece of spaghetti is enough to block her windpipe and make her choke. It's an exaggeration, see? Because, like you, a normal person can eat a whole plate of spaghetti, but Yo Mama can't even swallow a strand. The joke plays on the contrast between the normal size of things and how super skinny yo mama is.