chockablock

or chock-a-block

[ chok-uh-blok ]
/ ˈtʃɒk əˈblɒk /

adjective

extremely full; crowded; jammed: a room chockablock with furniture and plants.
Nautical. having the blocks drawn close together, as when the tackle is hauled to the utmost.

adverb

in a crowded manner: books piled chockablock on the narrow shelf.

Origin of chockablock

cf. chock close (up to), apparently as back formation from chock-full
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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