can memes become extinct?

So this wikipedia article says "Memes that propagate less prolifically may become extinct." So, if a meme is recorded in some fashion, either textually, in pictures, video, et cetera, but is no longer in general use, can it be considered extinct? Unlike extinct biological life, a meme could be revived at any time be simply by a culturally influential person (or entity like a tv show or advertisement) reintroducing it. For example, what if Lady GaGa started saying "where's the beef?"