Her boss really 'gave her the shaft' [=treated her unfairly] when he promoted someone less experienced instead of her.
He got promoted and she 'got the shaft'.
You really 'got shafted' in that deal.
(..) to the ballroom. And it was wonderful. None of the boys noticed how mulish and tall I was. The shaft each other and threatened to duel if they thought it was their turn to dance. Whispered in my ear how they wanted to marry me and take me back to their castles. I'd never been so happy. (..)2015 TvShow: Game of Thrones Title: High Sparrow Season: 5 Episode 3