Green’s Dictionary of Slang

crown n.1

1. the female genital area.

[UK]Partridge DSUE (8th edn) 273/2: latish C.19–20.

2. (US black) a hat.

[US] ‘Honky-Tonk Bud’ in D. Wepman et al. Life (1976) 54: A candy-striped tie hung down to his fly, / And he sported a gold-dust crown.
[US]N. Heard House of Slammers 86: He wore a candy-striped tie that covered his fly / And was sportin’ a gold-dust crown.
[US]Simon & Pelecanos ‘Slapstick’ Wire ser. 3 ep. 9 [TV script] I hear y’all shot the crown off an old lady’s head yesterday.

3. (US gay) the glans penis.

[US]B. Rodgers Queens’ Vernacular 104: glans penis; the acorn-like bulb forming the uppermost end of the penis [...] crown.

In compounds

crown and feathers (n.) [ext. feather n. (2); playing on a typical name for a public house]

the pubic hair.

[US]Maledicta IV:2 (Winter) 185: Common examples [of sexual ‘addresses’] include Cockshire, Cock Inn, Cupid’s Alley, Hairyfordshire, Crown and Feathers, Shooter’s Hill, Mount Pleasant, Love Lane, etc.

SE in slang uses

In compounds

crown jewels (n.) [their importance to the possessor]

the male genitals.

[UK]T. Keyes All Night Stand 61: ‘Little German totties waiting to get hold of me.’ [...] ‘After my bloody British crown jewels.’.
[US]J.P. Stanley ‘Homosexual Sl.’ in AS XLV:1/2 56: crown jewels n Male genitals.
[UK]Guardian Guide 13–19 May 52: A male prostitute is found with his crown jewels cut off.
[UK]B. Dark Dirty Cockney Rhy. Sl.
567 Cape Talk on Cape Radio 3 Mar. [radio] He’ll kick me in the crown jewels if I do.

In phrases

in the crown-office (adj.) [play on SE crown (of the head), which suffers]

tipsy.

[UK]B.E. Dict. Canting Crew.
[UK]New Canting Dict. n.p.: He is got into the Crown-Office, i.e. He’s got drunk.
[UK]Bailey Universal Etym. Eng. Dict. [as cit. 1725].
[UK] Gent.’s Mag. Dec. 559/2: To express the condition of an Honest Fellow [...] under the Effects of good Fellowship, [...] it is also said that he has [...] Been in the Crown Office.