gug

noun1

1. •
   A cave.

   • […] found in the Raised Beaches on the coast, or washed up into sheltered "gugs" or caves, as at the Gravel Gugs, Polzeath, where the shingle contains some 35 per cent of flint pebbles. — 1905

adjective1

1. •
   Initialism of gay until graduation.