Green’s Dictionary of Slang

bow n.1

[it shoots ‘arrows’, presumably of desire]

1. the penis.

[UK] ‘Trial of Joseph and Mary’ Coventry Mysteries (1841) 136: A cockoldeis bowe is eche nyght bent. He that shett the bolt is lyke to be schent.
[UK]J. Heywood Proverbs I Ch. xi: Ye have many stryngs to the bowe, for ye know, / Thought I, havyng the bent of your uncles bow, / Can no way bryng your bolt in the butte to stand.
W. Hawkins Apollo Shroving V iv: I thinke shee has vnbent Apollos bow.
[UK]T. Brown Dozen of Drunkards 13: No Jephthah’s daughter should bewaile her Virginity if she would but bend her string to his bow.
[UK]J.M. ‘Huntsmans Delight’ in Pepys Ballads (1987) IV 271: The Keepers they would a hunting go, And under their coats each carried his bow, And all for to shoot the bonny bonny Doe.
Etherege letter 10 Apr. in Letterbk of Sir G Etheredge (1928) 182: It is but seldom I have had occasion in this grave place to draw my Bow, and when I have, I did not perceive my Nerves were slacken’d.
[UK] ‘The Maids Lesson’ in Farmer Merry Songs and Ballads (1897) I 212: She boldly to the Bow must fly, / As if she’d make it crack, / Two fingers on the hair must lye, / And two upon the Back.
[UK] in D’Urfey Pills to Purge Melancholy IV 93: To run with his Bow he was not slow, His Fingers were nimble and quick, When he play’d on his Bass, he ravish’d the Lass.
[Scot] ‘Duncan Macleerie’ in Burns Merry Muses of Caledonia (1965) 177: Duncan he play’d till his bow it grew greasy.
[UK] ‘Cupid Turned Housebreaker’ in Rambler’s Flash Songster 39: To talk about his bow and arrow, tho’ some may delight.
[UK]Farmer & Henley Sl. and Its Analogues.

2. the buttocks.

‘The Saucy Hell-Cat and the Indiaman’ in Lloyd’s Companion 19 Sept. 2/5: ‘Damme, d’ye think I’m the pirate cap’n, that yer claps that ’ere bull-dog [...] so close to my bows?’.

SE in slang uses

In compounds

bowhead (n.) [SE bow + -head sfx (1); lit. a woman with bows in her hair. The image is of a ‘nice little girl’]

(US campus) a young woman who pays a good deal of attention to her looks, dress and general image; she is assumed to be foolish, at best.

[US]Eble Campus Sl. Fall.
[US]P. Munro Sl. U. 44: bowhead girl who always wears bows in her hair; girl who pays close attention to the way she looks.
[US]Eble Sl. and Sociability 31: As in the general vocabulary of English, slang permits the compounding of words of various grammatical classes, with the exact relationship between the parts unspecified. noun + noun is the dominant pattern: [...] bowhead ‘stereotypical sorority member’ (she wears a bow [object] on her head [object of locative phrase]).
bow-legged (adj.) (US prison)

1. concurrent, of prison sentences.

[US]S. Morgan Homeboy 85: The judge relented [...] running the deuces bowlegged instead, as in concurrent.

2. consecutive, of prison sentences.

[US]Bentley & Corbett Prison Sl. 18: Bowlegged Multiple prison sentences that are to be served consecutively.
[US]J. Lerner You Got Nothing Coming 46: Running wild — bowlegged — that’s consecutive sentences, O.G.
bow-window (n.)

either of weight or prgenancy, a large, protruding stomach; thus bow-windowed adj.

[UK]Marryat Poor Jack 4: He was a very large man, standing six feet high, and with what is termed a considerable bow-window in front.
[UK]Thackeray Pendennis I 343: Look at that very bow-windowed man.
[UK]Rosa Fielding 16: I have no notion of having a pretty white belly bow-windowed before marriage!
[UK]Daily Tel. 6 May: She was what is vulgarly called bow-windowed [F&H].
[UK]Mirror of Life 17 Aug. 11/1: Some men fight all the better when they have bit of a bow window.
[Aus]Sydney Sportsman (Surry Hills, NSW) 18 May 2/3: [T]remendously above himself and with a bow window like George Reid.
[Aus]Argus (Melbourne) 18 Nov. 2/6: The threat of Bow Legs in his knees, and the Promise of Bow Windows (or Brewers’ Goitre) in his waistline.