What does chockablock mean?
Chockablock is an informal adjective and adverb meaning completely filled or crowded to capacity, almost always used in the pattern 'chockablock with': a bus chockablock with tourists, an inbox chockablock with unread messages. The word has a vivid nautical pedigree — aboard sailing ships, the 'blocks' were the pulleys in the rigging, and when a rope was hauled as tight as it would go, the two blocks would press together, or be 'chock-a-block'. From this image of gear pulled taut and touching, the term broadened in ordinary speech to describe anything jammed full. It appears in both British and American English, typically in conversational rather than formal registers, and carries a slightly colorful, energetic tone without being negative. A closely related form, 'chock-full', conveys much the same sense. Chockablock remains a lively, expressive alternative to plainer words like 'full' or 'crowded', lending writing a tactile, physical image of things pressed tightly together.
Completely filled or crowded to capacity.
"The harbor was chockablock with boats during the regatta."
Nearly always takes the complement 'with'.
To the fullest possible extent; as far as something can go (originally of nautical tackle).
"They winched the line until it was drawn chockablock."
Before it meant 'packed to bursting', chockablock described the moment a ship's rigging was hauled so tight the wooden pulley blocks literally knocked against each other.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of chockablock
Chockablock comes from nautical terminology of the age of sail. The 'blocks' are the pulley housings in a ship's rigging, and when a rope was hauled so tight that the two blocks came hard against each other, sailors said the tackle was 'chock-a-block' — with 'chock' here suggesting complete contact or jamming. By the mid-19th century the phrase had passed into general use as an adjective meaning crammed full, first in Britain and later more broadly. The word shares its 'chock' element with the noun 'chock', a wedge or block used to secure heavy objects.
How chockablock is actually used
Informal but widely understood in both British and American English. Almost always followed by 'with'. Often written 'chock-a-block' or 'chock-full' (a related but distinct form). Carries no strong negative connotation, though it can imply overcrowding.
Easily confused with chockablock
'Chalkboard' is a smooth board for writing in chalk, while 'chockablock' means completely filled or crammed.