AITCHBONE Meaning of AITCHBONE in English n. 1 the buttock or rump bone. 2 a cut of beef lying over this. [ ME nage-, nache-bone buttock, ult. f. L natis, -es buttock(s): for loss of n cf. ADDER, APRON ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012