Green’s Dictionary of Slang

church n.3

[in the context of a funeral]

(US) the end.

[US]Lyle & Golenbock Bronx Zoo 119: If he starts messing with the curve ball, he’ll lose something off his slider and it’ll be church.

SE in slang uses

In compounds

church-called (adj.)

(US black) drawn to the vocation of preaching.

[US]C. Major Juba to Jive 96: Church-called adj. (1920s–1950s) feeling compelled to become a preacher.
church key (n.) [the similarity in shape of the WWII US forces GI can-opener and an old-fashioned key; presumably some form of opener had been required since beercans were first merchandised in 1937]

(US) a can-opener; also as v.

[US]Western Folklore X 170: Church key. A bottle opener.
[US]Stephenson ‘Misc.’ in AS XXXIX:3 235: church key, n. A bottle opener.
[US](con. 1958) R. Farina Been Down So Long (1972) 120: Returning a six-pack of Ballantine ale and a church key with a synthetic ruby on the handle.
[US](con. 1950s) H. Junker ‘The Fifties’ in Eisen Age of Rock 2 (1970) 99: Do you have proof (an I.D.)? Churchkey.
[US]L. Heinemann Close Quarters (1987) 66: She hooked the church key over the top of each bottle and with a sharp rap of her hand [...] opened the bottles.
[US](con. 1967) Bunch & Cole Reckoning for Kings (1989) 36: Shannon church-keyed a beer for Edmonds.
[US]Eble Campus Sl. Apr.
Practicing Oil Analysis Mag. Jan. 🌐 Further investigation revealed that the technician was using a church key type can opener on the oil containers instead of the proper oil spout.
church mouse (n.)

1. a regular attender at church.

[US]in DARE.

2. (gay) a male homosexual who frequents crowded churches in order to fondle any potential sex partners.

[US]G. Legman ‘Lang. of Homosexuality’ Appendix VII in Henry Sex Variants.
[US]B. Rodgers Queens’ Vernacular 108: In mission halls and Salvation Army flop-houses, these inexperienced lads might meet a church mouse or flinch bird who proposition young vagrants.
church parade (n.)

(UK society) the regular post-Sunday matins promenading of fashionable people.

[UK]Daily Tel. 17 Mar. in Ware (1909) 77/1: Mr Dutton asked [...] whether she did not part with the money to enable ‘the countess’ on the following Sunday to accompany her to the Church parade in the Park.
[UK]J. Ware Passing Eng. of the Victorian Era.
church-piece (n.) [it was the smallest silver coin and thus the least one could decently place in the collection plate]

(UK society) a threepenny piece.

[UK]Herts. Advertiser 28 Apr. 3/7: The sum of £153 14s. 5d. represented the total offertories, and that the number of coins represented the average value of about threepence. This coin, it would appear, is still regarded as [a] ‘church piece’ in Potter’s Bar.
[UK]J. Ware Passing Eng. of the Victorian Era.

In phrases

church is out [i.e. the service is over; one has no further chance to pray]

(US) everything is finished, no alternative is available.

W.R. Burnett Giant Swing 192: Joe saw Moon stagger across the floor and fall. Spanish had hit him with the back of his hand. Sig groaned and said: ‘Church is out’ .
[US]W.R. Burnett Little Men, Big World 217: Church is out, son, that’s all. [...] The Big Boys will have to tuck their tails between their legs and git back home.
[US]Current Sl. I:1 2/1: Church is out Something is over, or a chance is gone.
send to church (v.) [church a yack v.]

of a watch, to take the works of one watch and place them in the case of another with the aim of disguising its origins.

[UK]H. Brandon Dict. of the Flash or Cant Lang. 167: He sent the yack to church and got three finnips and a cooter for the sawney.
[UK]A. Morrison Child of the Jago (1982) 156: A watch is ‘sent to church’ when it is put into another case.