The most famous of all may be Bugs Bunny's "Ehh...What's up, Doc?" or it may be Tweety Bird's "I t'ought I taw a puddy tat...I DID...I DID taw a puddy tat!"

There are plenty of them. So who was it who said this one on frequent occasions:

"DAAAAWK!"

And after that is answered, volunteer some others for this thread.