| JACKFISH | • jackfish n. A jack (in any of the senses referring to types of fish). • JACKFISH n. a food fish. |
| JACKINGS | • jackings n. Plural of jacking. • JACKING n. in house dancing, moving the torso forward and backward in a rippling motion. |
| JACKSIES | • jacksies n. Plural of jacksy plural of jacksie. • JACKSIE n. (slang) the posterior, also JAXY, JAXIE, JACKSY. |
| JERKIEST | • jerkiest adj. Superlative form of jerky: most jerky. • JERKY adj. spasmodic. |
| JERKINGS | • jerkings n. Plural of jerking. • JERKING n. the act of jerking. |
| JINGKOES | • JINGKO n. (Japanese) a kind of tree, also GINGKO, GINKGO. |
| JOCKIEST | • JOCKY adj. resembling an athlete. |
| JOKINESS | • jokiness n. The state or condition of being joky. • JOKINESS n. the state of being amusing. |
| JOYSTICK | • joystick n. A mechanical device consisting of a handgrip mounted on a base or pedestal and typically having one… • joystick n. (Slang) A penis. • joystick v. (Rare) To manoeuvre by means of a joystick. |
| JUKSKEIS | • jukskeis n. Plural of jukskei. • JUKSKEI n. (South African) an outdoor game similar to quoits. |
| JUNKIEST | • junkiest adj. Superlative form of junky: most junky. • JUNKY adj. rubbishy, worthless. |
| KILLJOYS | • killjoys n. Plural of killjoy. • kill-joys n. Plural of kill-joy. • KILLJOY n. one who spoils the fun of others. |
| KIPUNJIS | • kipunjis n. Plural of kipunji. • KIPUNJI n. a long-tailed Tanzanian monkey with a crest of erect hair. |
| SKIJORER | • skijorer n. One who skijors. • SKIJORER n. one who does skijoring, also SKIKJORER, SKIORER. |
| SKIPJACK | • skipjack n. Any of several not closely related fish. • skipjack n. (Obsolete) An upstart. • skipjack n. An elaterid; a click beetle. |
| STICKJAW | • stickjaw n. Food that is difficult to chew or swallow, such as toffee or pudding. • STICKJAW n. a sweet meat. |