OK, here's a post for the clued up.
I have been reliably told by my son that NO-ONE calls a group a group nowadays....it's a band.
And also there are no discos, only clubs.
And 'girlfriend' is on it's way out, though what they put in place of that I don't know....maybe 'partner'...?
And as for the word 'courting'....forget it....no-one does THAT anymore....you're 'seeing' someone.
So come on you clued up ones, tell us what's gone out wordwise. What word makes you cringe with it's old-fashionedness?