Holy shit there's so many yo mama jokes. Here's mine: Yo mama so skinny she used a cheerio as a hula hoop.
Yo mama so fat that she made a plane unstable and crashed it into the Twin Towers.
Yo mama so old that she has Jesus's autograph.
Yo mama so ugly that not even makeup can save her.
Yo mama so dumb that she thought Rocket League was a competition between kids in wheelchairs.
tateman
Hey to back you up use this as well. The world used to be flat, until their buried your mom. Use this in a roast battle.