Green’s Dictionary of Slang

twig n.3

1. (Irish) a club, a shillelagh.

[UK]Regiment 18 Apr. 42/2: A bit of a shillelagh was all the arms he bore— / A purty light blackthorn I cut him in Dramore. / ‘Come on, ye baste,’ says he, ‘an’ taste the weight of me counthry’s twig’.

2. (US black) a tree.

[US] ‘Jiver’s Bible’ in D. Burley Orig. Hbk of Harlem Jive.

3. (US black) a human leg.

[US] ‘Jiver’s Bible’ in D. Burley Orig. Hbk of Harlem Jive.

4. a marijuana cigarette.

[US]cited in Spears Sl. and Jargon of Drugs and Drink (1986).

5. (US campus) a notably thin person.

[US] P. Munro Sl. U.

6. (US drugs) a very small piece of crack cocaine.

[US]J. Lethem Fortress of Solitude 383: He showed me what was a rock and what was a pebble and a twig. He and I smoked a few of these.

7. the penis.

[US]Herz & Steinberg Amer. Pie 2 [film script] kevin: So, how are the twig and giggleberries this morning? jim: Oh, very colorful, my dick looks like a paint by number.

8. (US) a finger.

[US]J. Porter ‘One More Day Can’t Hurt’ in ThugLit Apr. [ebook] These old twigs [...] Had they ever been good fingers or were they always just old twigs?

In compounds

twig and berries (n.)

the male genitals.

[US]Monteleone Criminal Sl. (rev. edn) 245: twig and berries the male pudendum.
[US]Eble Campus Sl. Nov. 13: twig and berries – male genitals.
Twitter 25 July 🌐 In preparing eunuchs, why do some cultures cut off the, ahem, twig & berries, and others just the berries?
[Aus]N. Cummins Tales of the Honey Badger [ebook] I [...] dropped me duds and climbed out over the water swaying in the breeze.

SE in slang uses

In phrases

drop off the twig (v.)

to die, as if one were a bird.

B. Humphries in Life and Death of Sandy Stone (1991) 78: I just had a horrible dream. I dreamed I dropped off the twig.
[Aus]D. Maitland Breaking Out 104: I’ll drop off the twig in some style.
[Aus]B. Humphries Complete Barry McKenzie 12: Feeling giddy. Perhaps I’m droppng off this twig.
[UK]Observer Rev. 24 June 3: When I do drop off the twig, I fear it’s going to say on my gravestone: ‘Japanese game show man dies.’.
fall off the twig (v.)

to die.

[UK]J.J. Connolly Layer Cake 49: What shillings her old boy left when he fell off the twig went on death duties.
hop the twig (v.)

see separate entry.

snap one’s twig (v.)

(Aus.) to lose emotional control.

[Aus]N. Keesing Lily on the Dustbin 184: Family members [...] will long remember tht day mum ‘blew her top’, ‘snapped her twig’, ‘popped her cork’, ‘did her block’ and ‘chucked a willy.’.