Bo, the Portuguese water dog.

"... a gift by that Portuguese water dog-lovin' senator himself, Edward M. Kennedy of Massachusetts. The girls named it Bo -- and let it be noted that you learned that here first. Malia and Sasha chose the name, because their cousins have a cat named Bo and because first lady Michelle Obama's father was nicknamed Diddley, a source said. (Get it? Bo . . . Diddley?)"

So, fine, nice, he really did get the dog. A promise kept. Good.

But the interesting issue here is: How did Barrack Obama Michelle's dad get the nickname Diddley? The Urban Dictionary says:

1. diddley...

1) Word used in place of general explicit language in order to soften the emotion of the language.
2) A person acting in a silly manor
3) An endearing way to address a friend
4) An omen of good fashion
5) One's genitalia

1) "What the diddley?"
2) "She's quite the diddley."
3) "Diddley, I love you."
4) "May the diddley be with you."
5) *pokes you in the diddley*

I'm thinking An endearing way to address a friend, aren't you?

ADDED: I need to read more carefully!