Definition of chockablock adjective from the Oxford Advanced American Dictionary

 

chockablock

 adjective
adjective
NAmE//ˈtʃɑkəˌblɑk//
 
(also chock-a-block)[not before noun]chockablock (with something/somebody)(informal)
 
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very full of things or people pressed close together The shelves were chockablock with ornaments. It was chockablock in town today (= full of people).