Tweedle Dee is a fat short little man from Alice in wonderland.:-/
Alice:Who are you?
Tweedle Dee:Tweedle Dee,of course!
Alice:Oh the fat chubby short one?
Tweedle Dee:What?Where did you hear that?
Alice:Urban Dictionary!
Whoop Dee Do is a term that is used when expressing sarcasm towards a certain event. For example, a bunch of people go crazy over a new pillow being promoted or some crap like that.
Or if a bunch of people went freakin' wild over a new pair of shoes. You probably wouldn't think of it as a big deal, because, well, it's just a pair of shoes. The same thing goes for pillows and other inanimate objects.
*At the mall, a bunch of people get excited as hell over a new mattress*
You: Well, whoop dee do, what's the big deal about a mattress? I mean, it's just a mattress, right?