Green’s Dictionary of Slang

(UK Und.) an illegitimate child.

1674		Head Canting Academy (2nd edn) n.p.: stall whimper A Bastard.
c.1698		B.E. Dict. Canting Crew.
1707		J. Shirley Triumph of Wit.
1725		New Canting Dict.
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict.
1754		Scoundrel’s Dict. 15: Bastard – Stalewhimper.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
a.1790		H.T. Potter New Dict. Cant (1795).
1809		G. Andrewes Dict. Sl. and Cant.
1811		Lex. Balatronicum.
1835		G. Kent Modern Flash Dict. 32: Stale whimper [sic] – a bastard.
1848		Flash Dict. in Sinks of London Laid Open.