elfwreck commented on igtow's post:

These are three that linger in my mind.

Snape to Harry:
"Kindness isn't even a normal component in my affairs.", (Tira Nog, Growing Pains)

Snape to Harry:
"I doubt that mutual fellatio is quite what he had in mind." (Gatewaygirl, Finder's Fee)

Sirius to Snape:
"I'll just go have myself a nice slice of vituperative self-righteousness. With a piquant sauce, too. Should that be a truffle sauce, do you think, or-oh, never mind." (Fabularasa, Repechage)