Naut. slang. [? f. CAULK v.] A dram, a ‘drop’ of liquor; = CAULKER 3.
1833. Marryat, P. Simple (1863), 265. I had no time to take a caulk if I was inclined.
1880. Mrs. Parr, Adam & Eve, xxxii. 443. I’ve a had a bit o’ a caulk, but not a drap more.
