The term used in the surgeon's logbook to describe the sort of smeggy excretion produced by all the members of HMS Port Royal after they were all entertained by the same lady in a Port in Jamaica over a three-day period. Widely recognised as an excuse for having no quinine left.
'...Jan 21, 1653. The men are all up against the trots and the penile curd, although the hammocks preclude any buttock-ranging infestations...' Naval Surgeon, HMS Gallant
by ButtoxGalore January 21, 2008