Meaning of the word "scholars talk books, butchers talk pigs" in English

What does "scholars talk books, butchers talk pigs" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

scholars talk books, butchers talk pigs

US /ˈskɑː.lɚz tɔːk bʊks, ˈbʊtʃ.ɚz tɔːk pɪɡz/
UK /ˈskɒl.əz tɔːk bʊks, ˈbʊtʃ.əz tɔːk pɪɡz/
"scholars talk books, butchers talk pigs" picture

Idiom

people tend to talk about things related to their own profession or interests

Example:
It's no surprise they are discussing code at dinner; scholars talk books, butchers talk pigs.
The doctors spent the whole party talking about surgery; I guess scholars talk books, butchers talk pigs.