Definition of rib roaster in US English:

rib roaster

noun

rare, slang
  • Sport (Cricket and Baseball). A ball bowled or pitched so as to strike the ribs. Now archaic.

Origin

Late 18th century (in an earlier sense). From rib-roast + -er.

Pronunciation

rib roaster

/ˈrɪbˌrəʊstə/