Rum, slightly sweetened and flavoured with the lime and clove flavours of falernum.
There is much debate over the Corn 'N' Oil, particularly the type...
I went with 45ml Mount Gay Eclipse, 15ml Appleton Estate Signature, 15ml Velvet Falernum and 3 dashes of Ango over ice with a couple of lime wedges and a 15ml float of Skipper Dark. Absolutely delicious and I suspect very dangerous.