Green’s Dictionary of Slang

to eat a chop.

1841		Mrs. Gore Cecil xx: I would rather have chopped at the ‘Blue Posts’ [...] [M.] [F&H].
1864		G.A. Sala Quite Alone III 79: Come and chop on Sunday?
1887		G.A. Sala Illus. London News 5 Feb. 144: I went one day... to chop at the ‘Cock’ [M.] [F&H].