Green’s Dictionary of Slang

coral branch n.

the penis.

1653		Urquhart (trans.) Gargantua and Pantagruel (1927) I Bk I 44: Another again [would call it] her branch of coral, her placket-racket, her Cyprian sceptre, her tit-bit, her bob-lady.
1665		Head Eng. Rogue Pt I i ii : They loved to play at a Small Game rather than stick out; rather than not have their itching Gums rubb’d at all, they would admit of a Childes Corral to execute the Office.
c.1680		‘Taunton-Dean Damosel’ in Chappell Roxburghe Ballads (1880) III 260: [A] pretty Toy ... Like a rich Coral.... Adorn’d with pretty Bells.
1693		‘Age Renewed by Wedlock’ in Pepys Ballads (1987) V 159: He has a curious Correl As long as both my Thumbs, With two Bells at the end on’t With which he rubs my Gums.
1696		Motteux (trans.) Gargantua and Pantagruel (1927) II Bk IV 258: A fine and eleven Inch long Branch of red Coral, for her Christmas-Box.
1709		‘The Discovery’ Cabinet of Love (1739) 180: With Transport he some little Time lay dead; / But soon reviving, rais’d his Coral Head.
1725		B. Mandeville An Essay upon Whoring iii: This Branch of Immorality has grown under your Hands.
[1787		Harris’s List of Covent-Garden Ladies 59: A pair of dark blue eyes [...] invite the blind coral headed boy into her cloister of teeming joys].
1787		Harris’s List of Covent-Garden Ladies 76: She is very fond of a good sprig of coral and cares not how red the tip is.
1835		‘Chloe and her Coral’ in Cove in Spedding & Watt (eds) Bawdy Songbooks (2011) IV 222: She tunes it and plays it all day and night, / She’s patrtial to, partial to the coral, O.
1890–1904		Farmer & Henley Sl. and Its Analogues.
1893		‘Bob Sterling’ Town-Bull 107: Three copious drops from each coral branch she plucked.
1902		D. St John Memoirs of Madge Buford 25: ‘Drink [...] you to this branch of coral — I, to that rosy crevice’.