The term 'SOME NERVE' can be broken down into four words: GALL, OPTIC, SHEESH, and THEIDEA. GALL is a noun meaning 'impudent boldness or effrontery'. OPTIC is an adjective meaning 'of or relating to the eye or vision'. SHEESH is an interjection expressing surprise, dismay, or annoyance. Finally, THEIDEA is a noun meaning 'an opinion, belief, or thought'. Taken together, the phrase 'SOME NERVE' can be interpreted as expressing disbelief at someone's audacity or boldness.