[staplung]

  The Vermin only teaze and pinch
  Their Foes superior by an Inch.
  So, Nat'ralists observe, a Flea
  Hath smaller Fleas that on him prey,
  And these have smaller yet to bite 'em,
  And so proceed ad infinitum:
  Thus ev'ry [Poster], in his Kind
  Is bit by him that comes behind.

;)

[mock-possum]

I like the way this one flows better.

[flir]

Iambic tetrameter. Lub-dub, lub-dub.