What does “bruising someone” mean?
Native speaker’s answer
Rebecca
"Bruising someone" means to hurt someone in a way that leaves a lasting mark. It can be in a literal sense where there is a physical mark from an impact on your skin. It can also be in a metaphorical sense where someone hurt your feelings and it left a lasting impression on you. In this video, Sheldon is referring to the metaphorical sense. He is saying that life is difficult and can hurt us in lasting ways.