Pushing up his [fake] glasses, Peeves sat at one of the reference tables with a ginormous book in front of him. Supercalifragilisticexpialidocious, he mentally repeated, trying to sound it out just right. This was one of the longest words he could find, which meant using it would maybe impress the headmaster enough to let him teach a lesson next term.

{Enter Peeves' imagination}

“Oh headmaster! It would be supercalifragilisticexpialidocious of you if you let me teach the children a lesson next term”

“Only if you don't use the dictionary as your textbook” the headmaster warned.

“You won't be disappointed” Peeves grimaced.