rosiner
/ˈrɒzɪnə
/noun Australian & Irish informal
An alcoholic drink, especially a large serving of a spirit such as whisky or gin: there’s no harm in a rosiner after a hard day’s travel...
- He was taking me for a rosiner and I didn't want to offend him.
- All I wanted was the money to get a rosiner.
- I need a rosiner.
Origin
Late 19th century: from the verb rosin in the dialect sense 'ply with alcoholic drink' + -er1.