blue blood
noun
plural
blue bloods
plural
blue bloods
Britannica Dictionary definition of BLUE BLOOD
1
[noncount]
:
membership in a royal or socially important family
2
[count]
:
a member of a royal or socially important family
— blue–blooded
/ˈbluːˈblʌdəd/
adjective
[more blue–blooded; most blue–blooded]