chock-full: [14] There is more than one theory to account for this word. It occurs in a couple of isolated instances around 1400, as chokkefulle and chekeful, prompting speculation that the first element may be either chock ‘wooden block’, which came from an assumed Old Northern French *choque (thus ‘stuffed full with lumps of wood’) or cheek (thus ‘full up as far as the cheeks’). It resurfaces in the 17th century as choke-ful, which has given rise to the idea that it may originally have meant ‘so full as to choke’. The available evidence seems too scanty to come to a firm conclusion. [chock-full etymology, chock-full origin, 英语词源]