jacks

British  

/ dʒæks /

noun

1. Sometimes called: knucklebones.  (functioning as singular) a game in which bone, metal, or plastic pieces ( jackstones ) are thrown and then picked up in various groups between bounces or throws of a small ball

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Etymology

Origin of jacks

C19: shortened from jackstones , variant of checkstones pebbles

Example Sentences

That includes Iran, which is straining under a historic drought made worse by years of mismanagement, while climate change jacks up temperatures and reduces rainfall.

From Salon

Our switchboards have only enough jacks and plugs for Bell subscribers who live here in Washington.

From Literature

My heart is doing jumping jacks, and my bottom leg is starting to tingle, halfway to falling asleep.

From Literature

A lonely coyote stalks the barren ground around oil pump jacks; a dead deer, its eye milky white, lies on a fern-like blanket of boughs.

From The Wall Street Journal

A large British contingent descended on Livigno Snow Park on Sunday to watch Bankes and Nightingale, with huge union jacks plastered with their images pinned to the front of the fan zone.

From BBC