“Snape was looking as though the first person to ask him for a Love Potion would be force-fed poison.”

“Deliberately causing mayhem in Snape's Potions class was about as safe as poking a sleeping dragon in the eye.”

“Professor Snape was forcing them to research antidotes. They took this one seriously, as he had hinted that he might be poisoning one of them before Christmas to see if their antidote worked.”

“Well, you're expelling us aren't you?" said Ron."Not today, Mr. Weasley."Snape looked as though Christmas had been canceled.”

“This is your copy of Advanced Potion-Making, is it, Potter?”“Yes,” said Harry, still breathing hard.“You’re quite sure of that, are you, Potter?”“Yes,” said Harry, with a touch more defiance.“This is the copy of Advanced Potion-Making that you purchased from Flourish and Blotts?”“Yes,” said Harry firmly.“Then why,” asked Snape, “does it have the name ‘Roonil Wazlib’ written inside the front cover?”Harry’s heart missed a beat. “That’s my nickname,” he said.”

“Mr. Moony presents his compliments to Professor Snape, and begs him to keep his abnormally large nose out of other people's business.Mr. Prongs agrees with Mr. Moony, and would like to add that Professor Snape is an ugly git.Mr. Padfoot would like to register his astonishment that an idiot like that ever became a professor.Mr. Wormtail bids Professor Snape good day, and advises him to wash his hair, the slimeball.”

“What is the difference, Potter, between monkshood and wolfsbane?"At this, Hermione stood up, her hand stretching towards the dungeon ceiling.I don't know," said Harry quietly. "I think Hermione does, though, why don't you try asking her?" A few people laughed; Harry caught sight of Seamus's eye and Seamus winked. Snape, however, was not pleased.Sit down," he snapped at Hermione. "For your information, Potter, asphodel and wormwood make a sleeping potion so powerful it is known as the Draught of Living Death. A bezoar is a stone taken from the stomach of a goat and it will save you from most poisons. As for monkshood and wolfsbane, they are the same plant, which also goes by the name of aconite. Well? Why aren't you all copying that down?"There was a sudden rummaging for quills and parchment. Over the noise, Snape said, "And a point will be taken from Gryffindor house for your cheek, Potter.”