Jack

(noun) a small worthless amount. Synonyms: jack, doodly-squat, diddly-squat, diddlysquat, diddly-shit, diddlyshit, diddly, diddley, squat, shit. Example: "You don't know jack."

(noun) a man who serves as a sailor. Synonyms: mariner, seaman, tar, Jack-tar, old salt, seafarer, gob, sea dog.

(noun) someone who works with their hands; someone engaged in manual labor. Synonyms: laborer, manual laborer, labourer, jack.

(noun) immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted. Synonyms: jackfruit, jak, jack.

(noun) a small ball at which players aim in lawn bowling. Synonyms: jack.

(noun) an electrical device consisting of a connector socket designed for the insertion of a plug. Synonyms: jack.

(noun) game equipment consisting of one of several small six-pointed metal pieces that are picked up while bouncing a ball in the game of jacks. Synonyms: jack, jackstones.

(noun) small flag indicating a ship's nationality. Synonyms: jack.

(noun) one of four face cards in a deck bearing a picture of a young prince. Synonyms: jack, knave.

(noun) tool for exerting pressure or lifting. Synonyms: jack.

(noun) any of several fast-swimming predacious fishes of tropical to warm temperate seas. Synonyms: jack.

(noun) male donkey. Synonyms: jack, jackass.

(verb) lift with a special device. Synonyms: jack, jack up. Example: "Jack up the car so you can change the tire."

(verb) hunt with a jacklight. Synonyms: jacklight, jack.