chock-a-block

or chock·a·block

1. Squeezed together; jammed: The cheering fans were chock-a-block in the stands.
2. Completely filled; stuffed: “I recommend the north shore chowder, chockablock with pieces of seasonal fish” (Charles Monaghan).
3. Nautical Drawn so close as to have the blocks touching. Used of a ship's hoisting tackle.

Origin:

Origin: Alteration (influenced by chock)

Origin: of block-a-block

Origin: : block

Origin: + a-²

Origin: + block