Mother of All Courtneyisms:

Court: (while watching me get dressed in the morning), Mommy, I think I need a bra...
Me: Baby, maybe when you get bigger. You don't have any chi chis yet
Court: Yes I do (pointing to her chest) They're right here!

I think my husband is going to have a heart attack! I personally found it hysterical!

Some others:

Me: What do you want to wear to the grocery store
Court: I don't know, mommy, I haven't decided yet
Me: Well, we need to get dressed soon
Court: I'll figure it out later!

Excuse me!

Me: Hurry up baby, mommy is late for a meeting
Court: Well, call them and tell them they have to start without you

Now, why didn't I think of that :)