Green’s Dictionary of Slang

gristle n.

also gris, grist
[SE gristle-bone, any part of the body consisting of gristle]

1. the penis.

[UK]Fletcher Custom of the Country I i: Would any Man of Discretion venture such a Gristle, To the rude Claws of such a Cat-a-Mountain?
[UK]Wandring Whore II 12: As W— the Butchers son in the Stocks did Honor Brooks the rammish Scotch whore at D— between her Legs, not forgetting that Ursula had half a crown for showing her Twit-twat there, and half a crown for stroaking the marrow out of a mans Gristle.
[UK]School of Venus 108: Come my dear Soul, take me by the Prick, and put it into thy Cunt, [...] is much better than to say, take me by the Gristle [...] and put it into thy loves Paradice.
[UK] ‘When the Sheep were Shearing’ in Farmer Merry Songs and Ballads (1897) IV 196: Poor Doll grew Melancholy, / The Grist went by her Mill.
[UK]Cleland Memoirs of a Woman of Pleasure (1985) 74: I once more felt the smooth hard gristle, forcing an entrance.
[Scot] ‘Miss Moffat’ in Ranger’s Impartial List of the Ladies of Pleasure in Edinburgh n.p.: She does her business extremely well, as she still likes to mumble a piece of gristle.
[UK]‘Walter’ My Secret Life (1966) VI 1229: Again to have that bit of stiff male gristle, poking and plunging up and down the cunt.
[UK]Farmer & Henley Sl. and Its Analogues.
[UK]C. Dexter Last Seen Wearing in Second Morse Omnibus (1994) 444: Thinking of nothing but that great lump of gristle hanging between your legs.
[US]Maledicta IV:2 (Winter) 193: The grocery, the butcher’s and the sweet shop are all represented as well as the greengrocer’s. Thus there is […] hot dog pud, pud, pudding (older terms for sausage), meat, gristle, bone.
[UK]B. James Detective is Dead (1996) 169: Nice, but hardly a girl to get one’s gristle tightening.

2. (Aus.) courage, ‘guts’.

[Aus]J. Byrell (con. 1959) Up the Cross 146: Nobody [...] had the gristle to give Abraham or Abe a try.
[Aus]J. Byrell Lairs, Urgers & Coat-Tuggers 60: It isn’t easy when you measure just over five feet in your Packards to work up the gristle to even front a charlie let alone hook one.

In compounds

gristle-gripper (n.)

1. (Aus.) a masturbator.

[Aus] ‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxv 6/1: gristle gripper: A stupid person.
[Aus]R. Aven-Bray Ridgey-Didge Oz Jack Lang 29: Gristle Gripper Masterbator [sic].

2. the vagina.

M. Morton Lover’s Tongue 142: The image of being seized is embodied in the terms grabber and gristle-gripper.
A. Kafuna Killing Saantinni 14: A cunt these days can be referred to as a fadge, a gristle gripper, a fanny, a muff, a quim, a minge [etc.].
gristle-hammer (n.)

the penis.

[UK]M. Manning Get Your Cock Out 35: The drug was working major bone size on the blood in Moncey’s gristle hammer.

In phrases

gristle and grunt (n.) [rhy. sl. = cunt n. (1)]

(N.Z. prison) the vagina.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 81/2: gristle and grunt n. vagina.
give someone the gristle (v.)

(US black) of a man, to have sexual intercourse.

[US]Ebonics Primer at 🌐 grissel Definition: normally used as the verb phrase ‘giving the grissel’, to have sex with a woman in a hard and strong manner. Example: Shit, I gave that bitch the grissel all night long.