Down by the river of the Hanky Panky
Where the bull frogs jumped from bank to banky
He said "E-I-O-U
your mamma stinks and so do you"
ping-pong dingdong
Your breath smells like King Kong

I learned that 10 years ago in 5th grade when I moved to florida.
Actually I heard three versions then but this is the only one that stuck with me.