ponycart n a cart with an underslung axle and two seats Usage(s) By the time he was 21 he had a house, a wife, a ponycart and $7,000 in the bank. Cornells Bol talks wittily in his imperfect English, likes sloppy, comfortable clothes, has a plump wife and five chubby sons for whom he keeps a horse and a ponycart. Synonym(s) pony cart donkey cart tub-cart