calk
verb- When a joint was calked, the bell piece was then separated,1915 April 1, Gas Age, volume 35, page 328:
To make an indentation in the edge of a metal plate, as along a seam in a steam boiler or an iron ship, to force the edge of the upper plate hard against the lower and so fill the crevice.
Alternative Alternative form of caulk (“to take a short sleep, nap”).