Definition of neck-break in US English:

neck-break

noun

  • Scottish. A fall in which the neck is broken; (figurative) destruction; downfall. Now rare.

adjective

  • Chiefly regional. Likely to break the neck; dangerous, hazardous. Compare "break-neck". Now rare.

Origin

Mid 17th century (in an earlier sense). From neck + break.

Pronunciation

neck-break

/ˈnɛkbreɪk/