I think she means: let your hair down=> go to party and enjoy it, don't stay at home go out and enjoy Friday night! (Run out the stress)

Pull your socks up = try harder, make more of an effort

Actions speak louder than words = What you do is more important than what you say

Today's idiom from me:

busy as a bee = to be very busy!! To be doing/organising lots of things

Each to his own / to each his own = each person has the right to their own opinion

Hi Bruce, you're right but it's also fun to look at idiomatic expressions and see which expressions exist in different languages. Also for non native speakers some idioms can be quite confusing, so this thread is just a bit of (hopefully useful) fun! Maybe you have one in Latin