In linguistics, it means groups of words that form common phrases (e.g., "How do you do?"). The theory is that we learn these as if they were single, very long words: we don't form these phrases by thinking of each word individually and then grouping them.

chunk дословно переводится как ломоть. Из этого следует, что это какая-то часть языка ( граматика, аудирование, устная речь и т.д.). На мой взгляд это так.

Yes, I have. I 'm trying to learn the articals (articles) from 'BBC Learning English'. These are about how I should learn the language without dictionaries and grammar books, only - listening to. There is 'series is all about chunks of language'. A "chunk of language" means a section ...for example phrases relating to time, or colours, or daily routine etc etc

It is close to mind that it means some kind of partitioning of a language. But I've found this article that could give some insight about it: http://whatsnewintheworld.blogspot.com/2009/05/chunks-of-language.html I hope that helps!

Do you have any context?