yo mama is so fat that..

the four funny ones i've heard so far.

yo mama is so fat that when she jump for joy, she get stuck!

yo mama is so fat that when she walk past the tv, i miss four shows!

yo mama is so fat that when she goes swimming in the sea, she and the whales sing, "we are family!"

and the last and funniest

yo mama is so fat that when she steps on the weighing scale, my handphone number shows up!