‘A glass of double rum!’ are the first words spoken in Disney’s Treasure Island.
What’s ‘double rum’? Is it a type of rum? Or was the pirate just asking for a double shot?
I’d certainly read it as a double shot. I don’t know that I’ve seen the term “a glass of double rum” before, but “a double whiskey” is a fairly common way of saying a double shot of whiskey.
It may refer to OP (overproof) rum. I am not basing this of any particular knowledge or cite, but its what I thought when I read the topic.
Maybe “double rum” is a special reserve that hasn’t been watered as (we might presume) is the proprietor’s usual practice.
I thought it was two different rums together, such as light and dark rums.
It’s a cocktail with a 1:1 mix of dark and light rum, plus pineapple juice. Further instructions are available here.