Student or Learner
A man describes his employee and says: Good worker, strong back. But he got a bad leg and not too much upstairs.
1. Does "strong back" just mean that he is strong?
2. I suppose it means one of his legs is (maybe) injured and he cannot walk upstairs?
To say he has a strong back usually means he is a good manual worker. The bad leg means exactly what it says, but "not too much upstairs" means he is not too bright. i.e. he is a slow thinker. If you've "not much upstairs (in your brain) " then you're slow-witted.
buggles (not a teacher)