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po·ny (pṓnē)

[Probably from obsolete French poulenet diminutive of poulain, colt, from Late Latin pullāmen, young of an animal, from Latin pullus.]

noun: pl., -nies. 

  1. Any of several types or breeds of horses that are small in size when full grown, such as the Shetland pony.
    1. Informal A racehorse.
    2. Sports A polo horse.
  3. Something small for its kind, especially a small glass for beer or liqueur.
  4. A word-for-word translation of a foreign language text, especially one used secretly by students as an aid in studying or test-taking. Also called crib, trot
  5. Chiefly British The sum of 25 pounds.

tr. & intr.v.: -nied, -ny·ing, -nies. 

To study with the aid of a pony: pony a lesson; ponied all night before the exam.

phrasal verbs

pony up
To pay (money owed or due).