Source : Webster's Revised Unabridged Dictionary (1913)

Chock-full \Chock"-full`\, a.
   Quite full; choke-full.

Source : WordNet®

chock-full
     adj : packed full to capacity; "chowder chockablock with pieces of
           fish" [syn: {chockablock(p)}, {chockful}, {choke-full},
            {chuck-full}, {cram full}]