13. Yo Mamma jokes are to be told in middle school only, any of them told outside a middle school will be branded on the joke teller, and their mother.
Your mother was a suicidal weasel who didn't mind taking off her clothes amongst cavemen in a time loop.
Your mother was a lousy computer programmer who worshipped cheese in a mortuary.
Your mother was a synthetic mud wrestler who used to go mad with a hacksaw in shopping centres.
Your mother was a sadistic cauliflower who embarrassed herself on an uninhabited island.
Your mother was an earthy liar who had her warts removed on the popular Game Show "Name That Vegetable".
Your mother was a brutish golem who designed outlandish clothes in an igloo.
Your mother was an annoying belly dancer who ran up huge phone bills in an illegal drinking establishment in New Guinea.
Your mother was an ungodly pygmy who farted constantly at the local cinema.
Your mother was an appalling road sweeper who used to watch John Wayne films with the help of volunteer workers.
Your mother was an aboriginal prostitute who talked incessantly about teapots in fish and chip shops.
Your mother was a double-ugly has-been who gave birth to you on a bungee rope.
Your mother was a backward tramp who ran a successful dating agency with a small imaginary friend called Derek.
Your mother was an inadequate Jerry Lewis impersonator who gave unpleasant diseases to countless people in the Millennium Dome.