watch (someone's) back

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.
See also: back, watch
Farlex Dictionary of Idioms.

watch your (or someone's) back

protect yourself (or someone else) against danger from an unexpected quarter.
See also: back, watch
Farlex Partner Idioms Dictionary
See also:
  • accompany (one) on a/(one's) journey
  • accompany on a journey
  • a dog in the manger
  • a stranger to (someone or something)
  • be out of (one's) league
  • be out of somebody's league
  • be in bad with (someone)
  • (one) puts (one's) pants on one leg at a time
  • bargain
  • bargain for (someone or something) with (someone)