It's important to stay professional at work, even if your colleagues are driving you up the wall.
But now, office workers have shared how they get around this problem - by revealing some of their favourite passive aggressive comebacks.
The discussion began after Twitter user @DeeRene_ posted: "What is your favorite phrase to use in a professional clap back? Mine is "per my last email..."'
Others quickly responded with the phrases they like to use to get their point across when they're annoyed at work, ranging from the subtle to the rather blatant.