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chock-a-blockor chock·a·block (chŏk′ə-blŏk′)
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.
Chock: a hall that was chock-a-block full.
1. filled to capacity; in a crammed state
2. (Nautical Terms) nautical with the blocks brought close together, as when a tackle is pulled as tight as possible