Source : Webster's Revised Unabridged Dictionary (1913)

Jolly \Jol"ly\, n.; pl. {Jollies}. [Prob. fr. {Jolly}, a.]
   A marine in the English navy. [Sailor's Slang]

         I'm a Jolly -- 'Er Majesty's Jolly -- soldier an'
         sailor too!                              --Kipling.