(transitive, idiomatic, Britain) To stop doing a regular activity. Often a job or studies.

(poker slang) A three and a nine as a starting hand in Texas hold 'em.

To raise, hoist, or lift a thing using a jack, or similar means. / (informal) To raise, increase, or accelerate; often said of prices, fees, or rates.

(obsolete) A monkey. / (dated, derogatory) An impudent or mischievous person.

plural of jackanape

A jack on a wall used to connect a telephone to the telephone line.

A jack on a wall used to connect a television to the cable television service.

(US) Amateur, untrained; incompetent. / (US) Dishonest, unscrupulous. / (US) Ineptly built or operated; makeshift.

A type of drill operated by means of compressed air. / (US) An amateur; an untrained or incompetent person.

Alternative form of jack-o'-lantern