A yellow-orange coloured drink, sold in pints, made by mixing a bottle of the alcopop Smirnoff Ice and a bottle of a high-caffeine alcoholic energy drink called Raw Spirit. Unique to, and college drink of, University College (colloquially known as 'Castle'), a college of the University of Durham. The drink is only available in the college's bar, the Undercroft, otherwise known as the 'Undie'.

the whale tail is the shape formed when a g-string rides up high over a womans trousers