subs. (thieves’).—A fool; a FLAT (q.v.). For synonyms, see BUFFLE and CABBAGE-HEAD.
1851–61. H. MAYHEW, London Labour and the London Poor, vol. I., p. 460. In four days my adviser left me; he had no more use for me. I was a flat. He had me for a GO-ALONG, to cry his things for him.
1853. Household Words, No. 183. s.v. ‘Slang.’
