Green’s Dictionary of Slang

jelly n.2

also geli’, gellie, gelly
[abbr./ pron.]

1. (orig. Aus.) gelignite.

[US]Howsley Argot: Dict. of Und. Sl. 11: can o’ jelly – a container of nitro or gelatine explosive.
[Aus]Baker Popular Dict. Aus. Sl.
[UK]B. Hill Boss of Britain’s Underworld 83: Gelignite is [...] no use on a safe which is concreted into a stone floor. Jelly only blow a hole in the safe then.
[UK]R. Cook Crust on its Uppers 57: Send him out with a pound of jelly, dets, or a dodgy twirl and then grass him.
[UK]J.P. Carstairs Concrete Kimono 173: Geli’ might be too noisy.
[UK]P. Fordham Inside the Und. 87: Jelly mostly comes from Scottish mines.
[Ire]J. Morrow Confessions of Proinsias O’Toole 22: The gelly disappears an’ the next night the Prods blow the Hiberian hall.
[NZ]G. Johnston Fish Factory 26: How much geli’ did you put in that last charge?
[NZ]J. Charles Black Billy Tea 45: When you have got to build a railway through the hills! / It takes an awful lot of ‘jelly’, shovels and picks.
[Aus]P. Carey Tax Inspector (1992) 56: She waved the gelly at him: ‘You grab me and you’re minced meat’.
[Aus]M.B. ‘Chopper’ Read Chopper From The Inside 35: I’ll take him fishing, a stick of ‘gellie’ in the river and bang, we’ll be knee deep in trout.
[Aus]Sydney Morn. Herald Good Weekend 24 Nov. 31/3: ‘I was so mad I was going to put a stick of gelly [...] under his shit-can and blow the c..t up’.
[NZ]McGill Reed Dict. of N.Z. Sl. 85: gelly/jelly Gelignite, early C20 here and later elsewhere.
[UK]N. ‘Razor’ Smith Raiders 138: You just pack the [safe] door with ‘gelly’, stand well back, and boom! there’s the money.

2. attrib. use of sense 1.

[UK]‘Charles Raven’ Und. Nights 191: He had somehow managed to exchange the gelly sticks for Edinburgh rock.

3. napalm.

[US]H. Ellison ‘A Boy and his Dog’ in Beast that Shouted Love (1976) 180: It [a film] was mostly gut-spilling [...] with napalm throwers, jellyburning a Chink town.
[UK]W. Boyd ‘On the Yankee Station’ in On the Yankee Station (1982) 131: There just ain’t nothing to beat this jelly, man. It’s gonna win us the woah.

In compounds