Refers to the penis, when being used in reference to a transvestite. It is said that one must always be careful to look for the Adam's Apple when hitting on strange women. Likewise, look out for the banana that goes with the apple!!!
Where there is an Adam's Apple, there is sure to be an Adam's Banana.
Did you see that "chick" that Harold took home last night? She had an Adam's Apple, and you know that chicks with Adam's Apples, always have Adam's Bananas.