CHOCKABLOCK
Etymology
Adjective
chockablock (comparative more chockablock, superlative most chockablock)
(nautical) (of a ship's hoisting tackle) Having the blocks drawn close together so no further movement is possible, as when the tackle is hauled to the utmost.
(by extension) Jammed tightly together; very crowded; completely filled or stuffed.
Adverb
chockablock (comparative more chockablock, superlative most chockablock)
In a crowded manner; as completely or closely as possible.
Source: Wiktionary
Chock"a*block, a. (Naut.)
Definition: Hoisted as high as the tackle will admit; brought close
together, as the two blocks of a tackle in hoisting.
Source: Webster’s Unabridged Dictionary 1913 Edition