pony

noun (plural ponies)

• 1a horse of a small breed, especially one below 15 hands (or 14 hands 2 inches).
• (the ponies) informal, chiefly North American racehorses:he had been playing the ponies on the side

• 2 informal a small glass or measure of alcohol:a pony of vodka

• 3British informal a sum of £25.

verb (ponies, ponying, ponied)

• pay a sum of money, especially as a contribution or unavoidable expense:he ponied up $450 for the project