(idiomatic) An issue to pursue with wholehearted conviction and/or single-minded focus, with little or no regard to the cost.

plural of hill to die on

plural of die-in

(numismatics) Any of the (usually metal) stamps used in pairs during hammered coining to strike impressions of designs onto their obverse and reverse faces.

(simile) Completely or totally straight.

To fail or flop; to lose popularity.

A machine that installs chips (electronic devices) onto a substrate and connects them to other devices

(slang) Someone who is wholeheartedly committed and supportive.

(slang) Wholeheartedly committed and supportive.

(slang) To support with wholehearted commitment.