That's what my daughter told my son last night before they went to bed. Apparently, he was crying because she somehow hit him in the lip by mistake but there was no blood and no bruise so she felt he was overreacting (which he was), and told him to quit being a baby.
We all tend to find ourselves in moments when we're caught up in our emotions. The deal doesn't go our way. The customer chooses a competitor. The market doesn't respond to our work. This sometimes causes us to overreact, so we take our ball and go home.
Every now again we need someone to whisper in our ear and say quit being a baby!