shop talk 
noun [mass noun]
Conversation about one’s occupation or business at an informal or social occasion: they kept off further shop talk until they were having coffee...
- When I was a kid I loved listening to all the shop talk around the breakfast table and dinner table.
- Autobiography prevails over shop talk, and every voice flickers with creative passion.
- Finally, there is plenty of shop talk in his conversations to keep film students and film buffs interested.