Piper

n.
  1. (Mus.) One who plays on a pipe, or the like, esp. on a bagpipe.
    1. A common European gurnard (Trigla lyra), having a large head, with prominent nasal projection, and with large, sharp, opercular spines.
    2. A sea urchin (Goniocidaris hystrix) having very long spines, native of both the American and European coasts.
    To pay the piper ,
    to bear the cost, expense, or trouble.