A suntan or sunburn whilst wearing clothes. A white mark is left where clothes or a watch have been, whilst the rest is pink, red or coloured by exposure to the sun. Usually on a day that was unexpectedly sunny. Synonymous with Southend-on-Sea in Essex, where sun is unexpected yet is a noted seaside resort. Usually experienced by chavs, people of low income or poor education, who have no ability to use suntan cream, or understand it's purpose, but yet are proud that the mark shows they have been out in the sun.
"Oh wow. Look. I got a suntan."
"Where ya been?"
"Southend. I got a Southend Suntan."