1 definition by CastleRanger

Top Definition
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'.
"I'm going to head down to the Undie for a Smenergy, see you there?"
by CastleRanger February 10, 2010

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