watch (someone's) back

To be willing and prepared to help or defend someone; to look out for someone in case he or she needs 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.

Common Names:

Name	Pronounced	Usage
Denise	[də'ni:z]
Louie	['lu:i]
Okropir	-	Georgian
ÁGoston	-	Hungarian
Placid	PLA-sid	English (Rare)
Mwanajuma	-	Eastern African, Swahili