1350-1400;Middle Englishchokke-fulle, equivalent to chokke (< ?) + fullefull1
Examples from the web for chock-full
In the summer, when the river's flow slackened, the slough became a placid lake bordered by sandy beaches chock-full of fish.
British Dictionary definitions for chock-full
chock-full
adjective
1.
(postpositive) completely full
Word Origin
C17 choke-full; see choke, full
Word Origin and History for chock-full
adj.
c.1400, chokkeful "crammed full," possibly from choke "cheek" (see cheek (n.)). Or it may be from Old French choquier "collide, crash, hit" (13c., Modern French choquer), which is probably from Germanic (cf. Middle Dutch schokken; see shock (n.1)).