know one's way around
1. Знать как устроен мир; обладать богатым жизненным опытом.
The sailor had been in the wildest ports in the world. He knew his way around.
Ср.: HAVE BEEN AROUND.
Before trying to make any pottery, it is better to get advice from someone who knows his stuff in ceramics.
Ср.: DRY BEHIND THE EARS.