a pervy man who glares at everyone that he dislikes which would include everyone. he wears the same shirt every day and eats off the floor. old greenberg is glued to a small silver whistle and pervs at everyone with his micropig that he owns.
charlie - ''see ronni, what do you think of him?''
ross - ''bit of an old greenberg tbh.''
a mad, fat, musical man who smells terrible, sweats like a pig, calls everyone son (including girls and people his own age), never remembers names including his own, has the word mackay somewhere in his name and is mentally retarded.
Girl: sits down in a classroom
Mad MacKay: ''You can't sit there, son!!!'
Girl: thinks to herself 'what a mad mackay!!!'