A Coke-o-nut.
Sweet Pee
One is good at rolling blunts, the other is good at bowling runts.
A Mississippi cup.
He finishes her drink EDIT: Apparently this is Conan's joke, so all credit goes to him. I just heard it from a friend of mine and I had no idea.
Picardi and coke
Mohammed Ali opening a can of coke.
George: HIJKLMNO Teacher: Is that the formula I gave you George: Sure you said H to O !
The sight of premature Ejack-o-lanterns in the neighborhood. I'm a Dad so this joke is OK