subs. (nautical).Shore-going clothes in general, and dress-clothes in particular.
1833. MARRYAT, Peter Simple, III. xiii. May I be so bold as to ax, Captain OBrien, whether I must wear one of them LONG TOG, swallow-tailed coatsbecause if so, Id prefer being quarter-master? Ibid. (1834), Jack Faithful, xxix. I had fitted on what are called at sea, and on the river, LONG TOGS; i.e., I was dressed as most people are on shore.
1883. W. C. RUSSELL, Sailors Language, s.v.