Worth your salt - Idioms by The Free Dictionary
worth your salt
worth (one's) salt
Warranting respect in a certain field or area, typically because one does one's job well. Any teacher worth his salt is able to inspire his students. I'm confident enough to know I'm worth my salt around here. I make a lot of money for this company.
worth your salt good or competent at the job or profession specified.
2000 Saga Magazine Every place setting is measured with a ruler because no butler worth his salt wants to get to the end of a table with say, four settings left, and nowhere to put them.
ˌworth your/its ˈsalt deserving respect, especially because you do your job well: Any teacher worth his salt knows that students who enjoy a lesson learn the most.This may refer to the fact that in Roman times soldiers were given an allowance of salt as part of their pay. The Latin word salarium (= the money given to Roman soldiers to buy salt) is the origin of the word ‘salary’.
References in classic literature
'Because there's not a skipper or mate that would think you worth your salt
, when he could get a practised hand,' replied the manager;
If you're a theater maven worth your salt
, you're always after the scoop on which tickets are bombs and which are necessities of life.