chock-a-block
Concise Oxford English Dictionary © 2008 Oxford University Press:
chock-a-block/tʃɒkəˈblɒk/
▶adjective informal, chiefly Brit. crammed full.
– origin C19 (orig. in naut. use, with ref. to tackle having the two blocks run close together): from chock (in chock-full) and block.
'chock-a-block' also found in these Oxford entries:
