Such as put one's head down.
We don't really put our heads down anymore though, do we?
They stay up, because we're all looking at computer screens.
I think we should change it to something like put my head forward? Can you think of anything better?
And in this day and age, with social networking and chatting online, a slip of the tongue isn't always relevant either. Perhaps it could be a slip of the pinky or a slip of the digit, you know?
Can you think of any other phrases that need changing? What would you change them to?