Spruik - To make or give a speech, especially extensively; spiel.
Dumbledore rose to his feet, sighing. He hated speechmaking. He was good at it and, as Headmaster, it was expected of him but he hated it. It made him feel too proud, too self-conscious.
And tonight, especially, he wanted to get it over with. He was ravenous and had a splitting headache.
He could see the students didn't want to listen to him either. They were fixing their eyes on him politely, but all they really wanted was food and bed.
"I would just like to say a few words before we begin….and here they are: Nitwit, Blubber, Oddment, Tweak!"