emove: a division in a school
slackers: unmotivated and lazy students
muck: useless, of no practical good
kept in: grounded, detained, work after the official school hours
got carried away: to get very excited or lose control of your feelings due to strong emotions.
cut: escape, go away without permission.
sadist: a person who gets pleasure out of inflicting pain to others
shrivelled up: having no feelings