How about "pure virtual methods"?

[Fredrik Lundh]

... From: Doug ...

(I think you could create some kind of drinking game based on the number of
non-quoted lines between the "From"-line and the first line containing the word
"boo" in Doug's posts on comp.lang.python.  A little like the game based on the
number of minutes between someone mentioning ElementTree or Anobind or
some other Python/XML toolkit in a blog post, and David Mertz adding a
comment about how his own tool can do the same thing faster and better...)

... boo ...

(</F>)