B. To be in a complete state of disarray, disarmed of all mental prowess, having been subjected to an overwhelming defeat - or having undergone a rigorous or lengthy trial.
C. Past tense of "Expelliarmus"
After working all day, and then going to see the midnight release of that movie - I'm all expelliarmussed out.
I expelliarmussed him SO HARD! You should have seen his face, ho ho ho.