Do you know a locksmith? What is it?

This is a stalk, which was very hot before. For example, if someone asks you, do you have a key? How much do you have? To put it simply, you don't deserve it, that is, this person is unqualified or incompetent. After all, people will ask you if you have a key when they meet the profession of matching keys. Match several. As a result, a network term was formed.