| jack rabbit | |
| —n | |
| any of various W North American hares, such as Lepus townsendi (white-tailed jack rabbit), having long hind legs and large ears | |
| [C19: shortened from jackass-rabbit, referring to its long ears] | |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a fool or simpleton; ninny. |