Yo mama so dumb, she sat on the TV, and watched the couch!
Yo mama so fat, when she sat on the TV, she squashed it!
Yo mama so scary, after she got off the floor from squashing the TV(I don't know how she managed to get up), she walked(or rolled) over to the couch, and when she was about to sit down, the couch exclaimed, "No! please don't kill me like the tele! I'm too young to die!"