Gerrunder - a regional pronunciation of "get under", as shouted by Pamela Tatler throughout her entire fourth year.
She once made a teacher so frustrated by her persistent one-word outbursts that he picked up her, her chair and her desk in one scooping movement, and put her outside the class.
After he deposited her outside the door and returned to the class, everyone went quiet. The calm was punctuated by a plaintive question from outside;
"Gerrunder?"
This was an innovation; she'd never punctuated her gerrunders before, and a new range of Gerrunder Moods was born.