tinnie noun3 •(Australia, slang) A can of beer.Far better to send one of the girls out for a pizza and some tinnies, and then give her undivided attention when she returns. — 2005 •(Australia, slang) A small open aluminium boat.The bullies laughed and whistled and the tinnie turned once more, this time racing straight towards them from the port beam, bows tilted up, spray creaming out. — 2003 •(New-Zealand, slang) A small package of drugs wrapped in foil.Or swapped them for some tinnies, a bottle of El D? — 2022 formstinnies