Green’s Dictionary of Slang

jean foutre n.

a Frenchman.

1653		Narration of the Late Accident 7: [of the Portuguese ambassador’s brother] The Gentleman casteth at me most contumelious words, repeating them twice or thrice in the French tongue, [...] calling mee Jean Foutre.
1664		Etherege Love In A Tub III iv: Jan foutre de Lacque; me vil have de Vip And de Belle vor your breeck, Rogue.
1675		R. Head The Art of Wheedling 16: [T]he other [...] in a very great passion, call’d him Bougre, Jean Foutre, and I know not what beside.
1719		in D’Urfey Pills to Purge Melancholy II 130: The French jam foutres mawl’d.
1768		Gentleman’s Bottle-Companion 37: A Monsieur Jeune Foutre in th’ int’rim came by.
1776		Caledonian Mercury 3 July 2/3: The man that dared to smile was a Jean Foutre.
1792		Northampton Mercury 21 Apr. 4/1: We know how to resist, we know when to obey, / Nor want Mounseer Jean Foutre to show us the way.
1883		(ref. to 1851) Dundee Courier 8 Jan. 3/6: Talking about the events of 1851 the Count calls M. de Turgot un Jeanfourtre.