The Dictionary of American Slang, Ctd.
lunch-hooks: n. pl. 1. The hands, the fingers. Most common c1900. 2 The teeth. Some c1900 use. 3. Fig., adverse or critical remarks. 1952: “It is difficult to caricature Mickey Spillane. But [Ira] Wallach [in his Hopalong-Freud Rides Again] has managed to get a set of predatory lunch-hooks into him.” G. Millstein in N.Y. Times Bk. Rev., Sept. 14, 7/1.