—n. 1. a small horse of any of several breeds, usually not higher at the shoulder than 14½ hands (58 in./146 cm).
2. a horse of any small type or breed.
3. Slang.a literal translation or other text, used illicitly as an aid in schoolwork or while taking a test; crib.
4. something small of its kind.
5. a small glass for liquor.
6. the amount of liquor it will hold, usually one ounce (29.6 ml).
7. a small beverage bottle, often holding seven ounces (196 g): We bought a dozen ponies of Mexican beer. 8. Older Slang.a diminutive chorus girl.
9. See pony pack. 10. Brit. Slang.the sum of 25 pounds.
—v.t. 1. Slang.to prepare (lessons) by means of a pony.
2. Racing Slang. a. to be the outrider for (a racehorse).
b. to exercise (a racehorse) by having a rider mounted on another horse lead it at a gallop around a track.
—v.i. 1. to prepare a lesson or lessons with the aid of a pony.
2. pony up,Informal.to pay (money), as in settling an account: Next week you'll have to pony up the balance of the loan.