On: Cheese Makers Keeping Monterey Jack’s Local Legend Alive

[fyp]

If you include slang usages there's also jack off (jerk off), car got jacked (hijacked), he got jacked (muscular), doesn't know jack (jack shit), jack in (term from megaman battle network)

[telesilla → fyp]

I'm under the impression 'Jacking in' was introduced by William Gibson in Neuromancer, 1984

[germinalphrase → fyp]

also a wooden assistant for removing one’s boots (aka boot jack)

[akovaski → germinalphrase]

also a playing card, or a small metallic object with tetrahedrally oriented spikes used in the game Jacks https://en.wiktionary.org/wiki/jack#English

[chrisdhoover → akovaski]

Jacks and jennies, male and female asses, jack leg, a bad tradesman, jacks a pointless kids game, jimmy jack, fiddle fart, ball the jack, go flat out