Heres so of my favorites
Yo momma's so dumb she passed by YMCA and said hey look they spelled MACYs wrong
Yo momma's so dumb she failed a survey
Yo momma's so dumb if you gave her a penny for her thoughts you'd get change
Yo momma's so dumb she bought a solarpowered flashlight
Yo momma's so dumb she got fired from the M&M factory for throwing away all the W&Ws
Yo momma's so dumb she got locked in a bathroom and wet her pants
Yo momma's so dumb she got locked in a grocery store and starved
Yo momma's so dumb she got locked in a mattress store and slept on the floor
Yo momma's so dumb she got locked out of a convertible car with the top down
Yo momma's so dumb she married Yo daddy
Yo momma's so dumb she ordered a cheese burger from McDonalds and said Hold the cheese
Yo momma's so dumb she sent me a fax with a stamp on it
Yo momma's so dumb she sold her Car for gas money
Yo momma's so dumb she sold her camera to buy film
Yo momma's so dumb she sold the house to pay the mortgage
Yo momma's so dumb that she got stabbed in a shoot out
Yo momma's so dumb that she uses whiteout as her toothpaste
Yo momma's so dumb that she went to a family reunion to look for a date