grumbletonian, n. — Green’s Dictionary of Slang

grumbletonian n.

[a pun on two late 17C religious sects, the Muggletonians (founded 1651 by Lodowicke Muggleton) and Grindletonians (? the Yorks. village of Grindleton); the term was used first as specific political jargon c.1690 when the ‘Court Party’ apostrophized as grumbletonians their ‘Country Party’ rivals, who, they claimed, resented their personal ambitions being thwarted]

a constant grumbler, esp. as regards the ‘state of the country’; also attrib.

c.1698		B.E. Dict. Canting Crew n.p.: Grumbletonians, Malecontents, out of humour with the Government, for want of a Place, or having lost one.
1705–07		N. Ward Hudibras Redivivus I:1 24: But all the Grumbletonian Throng / Did with such Violence rush along.
1773		O. Goldsmith She Stoops to Conquer Act I: Now, if I pleased, I could be so revenged upon the old grumbletonian.
1780		Notes & Queries 966 q. in Bath Chron. 3 June (1950) 16/2: If my Lady Dumpletonian will wear a hat at the ball, she must not be offended if my Lord grumbletonian cuts her ankle with his sharp pointed spurs.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
c.1786		Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Grumbletonian, one who Rails at the times or Ministry, a dissatisfied Person.
1811		Lex. Balatronicum.
1822		Scots Mag. 1 June 102/2: I‘ wish they were a’ adverbs,’ responded I in a grumbletonian accent and gesture.
1823		Scots Mag. 1 Dec. 15/2: Its author is a great grumbletonian.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1834		‘Jack Downing’ Andrew Jackson 74: The gineral having [...] discharged the grumbletonians, was now thinkin of restin awhile.
1854		N. Devon Jrnl 10 Aug. 5/2: The wording of the memorial shews it to be the work of some privileged ‘grumbletonian’ who [...] gives expression to a carping and malevolent dispoition.