Adj. (common).—Strong; hard; unyielding. Also ironbark (q.v.).
1888. Rolf Boldrewood, Robbery Under Arms, chap. vi. I always
thought he was ironbark outside and in.
Iron-cow. See Cow.
1785. Grose, Vulg. Tongue, s.v.
1811. Lex. Bal., s.v.
Iron-doublet, subs. phr. (old).—1. A prison. For synonyms see Cage.
1779. Bamfylde-Moore Carew, s.v.
1785. Grose, Vulg. Tongue, s.v.