Natch
Pronunciation : Natch
Part of Speech : n.
Etymology : [OF. nache fesse, LL. natica, from L. natis the rump, buttocks. Cf. Aitchbone.]
Definition : Defn: The rump of beef; esp., the lower and back part of the rump. Natch bone, the edgebone, or aitchbone, in beef.
Source : Webster's Unabridged Dictionary, 1913