While in Glasgow last summer, my wife and I were enjoying a Scotch at a crowed pub. A friendly gentleman struck up a conversation with us after he ordered a drink. The drink contained Guinness, Coke and Captain Morgan's Spiced Rum. He offered us a taste of the drink and we both liked the taste. He told us the name of the drink but, for the life of me, I can't remember it.

Does anyone know what the name of this drink is and what proportions of each ingredient goes into making the drink?