Snape: Reveal your secret! ... Show yourself! ... Professor Severus Snape, master of this school, commands you to yield the information you conceal.

Moony: Mr. Moony presents his compliments to Professor Snape, and begs him to keep his abnormally large nose out of other people's business.

Prongs: Mr. Prongs agrees with Mr. Moony, and would like to add that Professor Snape is an ugly git.

Padfoot: Mr. Padfoot would like to register his astonishment that an idiot like that ever became a professor.

Wormtail: Mr. Wormtail bids Professor Snape good day, and advises him to wash his hair, the slimeball.