1785. Grose, Vulg. Tongue, Grunter, s.v. A shilling.
1858. A. Mayhew, Paved with Gold, bk. III., ch. iii., p. 267. One
of the men ... had only taken three ‘twelvers’ [shillings] and a
grunter.
1885. Household Words, 20 June. p. 155. The sixpence ... is
variously known as a ‘pig,’ a ‘sow’s baby,’ a grunter, and ‘half a
hog.’
3. (common).—A policeman; a trap (q.v.); a pig (q.v. sense 2). For
synonyms, see Beak.
1820. London Magazine, i., 26. As a bonnet against ... grunters.
1859. Matsell, Vocabulum. Grunter, s.v., a country constable.