Green’s Dictionary of Slang

tinnie n.

also tinny

1. (orig. Aus. surfing) a can of beer.

B. Humphries A Nice Night’s Entertainment (1981) 79: So we all shacked up there with stacks of the old glühwein, a few crates of tinnies, a couple of little snow bunnies and no complications.
[Aus]Tharunka (Sydney) 3 Apr. 5/1: The vibes are good, the scoobs are great, the tinnies are cold and the waves aren’t bad either. So for Christ’s sake ya galahs, don’t be mugs, ’ave a go digger.
[Aus]R.G. Barrett You Wouldn’t Be Dead for Quids (1989) 129: Les placed a dozen tinnies [...] on the floor for Murray to drink.
[UK]Guardian Guide 9–15 Oct. 4: We’d just sit down with a couple of tinnies and talk.
[Aus]P. Temple Bad Debts (2012) [ebook] He gave the can the suck of a man who measures out his days in tinnies.
[Aus] [Internet] I was intent on just standing at the bar guzzling down VB tinnies.
[Aus] A. Savage ‘Killing Peacocks’ in Crime Factory: Hard Labour [ebook] Denise handed round tinnies of VB.
[UK]J. Fagan Panopticon (2013) 225: Mike cutting your hair with a pie in one hand and a tinny in the other.
Oxford Student 20 May 33/2: As long as the tinnies are cracked out and the chat is freely flowing.
[Aus]N. Cummins Tales of the Honey Badger [ebook] The kind of confidence usually reserved for a bloke with a gut-full of tinnies at the town dance.

2. (Aus.) a small aluminium boat.

[Aus]Herald (Melbourne) 7 June 35/1: The aluminium ‘tinnie’ has long been a major force in the Australian boat market for its low initial cost, durability and ease of use [AND].
[Aus]Sun-Herald (Sydney) 5 Sept. 112/1: Tinnies offer value, fun. Dollar for dollar it’s hard to go past the simple aluminium dinghy as a versatile fun boat [AND].
J. Doyce Three Men in a Tinnie [video] Tim’s 3-metre aluminium ‘tinnie’ that has only been sunk once.
[Aus]‘Australia Day’ ad for MacDonalds cited 10 Jan. [Internet] Back from the Murray are Hoddy ’n’ Binny, / with pav McFlurries ’n’ towin’ a tinnie.

3. (N.Z. drugs) silver foil, used for wrapping measures of cannabis; thus the measure of cannabis as sold as a single unit.

[NZ]Dominion (Wellington) 24 Nov. 1: She later suspected that drug deals were taking place at her former home [...] Judge Bouchier said large numbers of people from all over Auckland went to the house between 1990 and 1995 to buy ‘tinnies’ (cannabis bullets) for $20. [Ibid.] 6 Dec. 1: They could buy a ‘tinny’ (cannabis leaf wrapped in tin foil and enough for two or three joints), for about $20. 3 Oct. [Internet] Among the items located at the seven addresses were cannabis tinnies ready for sale.
Truth Newspaper Online (NZ) 29 Mar. [Internet] Some dealers were charging up to $30 for a cannabis tinny.

In compounds

tinnie house (n.)

a house or apartment used for cannabis sales.

National Business Rev. (NZ) 3 Apr. [Internet] New Zealand already has its own version of the crack house in the ‘tinny house’ – a gang-run dope shop operated on a strict business scheme marketing to school students which minimises risk while maximising revenue.
[NZ]N.Z. Herald 24 Feb. [Internet] The tinny house operators will be happy to have such a good advocate; the more police resources being wasted on this sort of nonsense, the fewer police to close down the illegal operators who are selling to underage kids.