Green’s Dictionary of Slang

churchy adj.

pious.

1843		T. Haliburton Sam Slick in England I 218: Preacher there don’t preach morals, because that’s churchy [...] but he preaches doctrine.
1880		Sunderland Dly Echo 28 Dec. 2/6: The Conservatives comprise the wealthy, the noble, and the churchy of the land.
1935		‘George Orwell’ Clergyman’s Daughter (1960) 72: His interests were almost purely ecclesiastical. He was what people call a churchy young man.
1943		R. Llewellyn None But the Lonely Heart 344: He see this bloke finding out about Ma [...] and then trying all this churchy business on Him.
1954		J. Steinbeck Sweet Thursday (1955) 23: You play some of the churchy music to her.
1974		(con. 1940s) E. Thompson Tattoo (1977) 200: If the old man fooled around a little [...] it wasn’t anything to trouble Mrs. Gerela’s mind. They weren’t churchy.
1992		A. Duff One Night Out Stealing 132: A guy. Deep voice. Big voice. Singing churchy crap. What, Sonny’s gone religious?
1998		I. Welsh Filth 57: He’s been married tae the same old boot for seventy thousand light years, the churchy auld cunt.
2004		T. Winton Turning (2005) 148: You’re churchy, right?