which reminds me of some others:

an extension to the blind man-
"I see said the blind man, as he picked up the hammer and saw."

"Nobody here but us chickens"

"That'll put hair on your chest" - usually said about burnt toast or a roasted wiener inadvertantly dropped in a fire.

"I'm the king of the castle and your the dirty rascal" - a school yard taunt that was commonly heard from any suitable piece of higher ground

"Fuzzy Wuzzy was a bear
Fuzzy Wuzzy had no hair
So Fuzzy Wuzzy wasn't fuzzy, was he."

"Liar, liar pants on fire
Nose as long as a telephone wire."

Also overheard in adult's conversations, but not understood by me at the time was the comment:

"Her heels are round" or conversely, "Her heels are square", depending on how someone judged a female's sexual behavior. I did get the general idea that it was considered better to have square heels than round ones and worried for quite awhile, when upon close examination, I perceived that that part of my anatomy was decidedly not square.