English @ the Movies: 'Watch Their Back'

source: VOA Learning English    2016年8月13日
Our English @ the Movies phrase this week is from the movie "Captain America: Civil War." This movie is about the superheros known at The Avengers. The phrase is "watch their back." Does it mean someone is in danger? Listen and find out.
Originally published at - http://learningenglish.voanews.com/a/...

# watch (someone's) back: To be willing and prepared to help or defend someone; to look out for someone in case they need assistance. Don't worry about those thugs, buddy. I'll watch your back if they ever come bother you again. You can always rely on your parents to watch your back.