spatchcock

Concise Oxford English Dictionary © 2008 Oxford University Press:
spatchcock/ˈspatʃkɒk/

▶noun a chicken or game bird split open and grilled. ▶verb

• 1 prepare (a poultry or game bird) in this way.

• 2 informal, chiefly Brit. add (a phrase, sentence, etc.) in a context where it is inappropriate.

– origin C18 (orig. an Ir. usage): perh. rel. to dispatch + cock1, but cf. spitchcock.