The Eggcorn Database - v. 0.5

The title of Mark Liberman’s 2004 Language Log piece gives a whole pile of variants: “Chock, choke, chuck, check, chalk, jock, shock, chog: An ancient plantation of ache-corns”. “Choke-full” is the original (with “chuck-full” and “chock-full” as early variants); “chock-full” is now the dominant variant. “Chock” doesn’t make much sense, so it’s no surprise that people have attempted to re-shape it. The connection to chalk is obscure (Brians: “Chalk has nothing to do with it”), but at least “chalk” is a reasonably common actual word (and homophonous with “chock” for some speakers).

“Chalk full” has been reported at least five times in the ecdb comments pages.