Guest: Why do you call Snape Snivellus?

James: It was Sirius that thought of it, actually.

Sirius: [tries to look modest] it was nothing, really. You see, he's just so greasy and snivelly.

Peter: And Severus, Snivellus, it kinda sounds the same.

Sirius: That was the whole idea, Pete.

Peter: [indignantly] I know!

James: All right, all right, keep your panties on

Sirius: Unlike Snivelly. [grins wickedly] Remember that day at the lake?

James: [laughs] how could I forget! Oh, what skinny legs that boy had.

Sirius: tiny and pale, just like something else that was hiding in his trousers!