Yo Mamma so fat she had…

Yo Mamma so fat she had to have a real horse on her polo shirt.
Jokes, +1:
An American tourist walks out of a Mexican train station when he notices he isn't wearing his watch. A Mexican man is resting under a sombrero under a nearby tree. The American approaches the Mexican and asks, "Excuse me, do you know what time is?" The Mexican looks at the donkey, grabs its balls, and replies, "4:30." The American asks, "How do you know that?" The Mexican replies, "Well you get a handful of the donkeys balls and lift them up so you can see that clock across the street."