Fake Birkenstocks that can be bought at Target or Wal-Mart or stores of that nature, and they don't cost a fortune. They tend to be more comfortable than real Birkenstocks because they aren't made of huge blocks of wood.
Tracy (unpopular): Like my new Birkenstocks, Kim?
Kim (popular): You mean Firkenstocks? I could tell those weren't real from a mile away, poser. *Turns nose up*