Meaning of weak sister | Babel Free

Definitions

1. A person who is cowardly or indecisive.
   US, derogatory, idiomatic
2. A person or thing which is the least robust or least dependable member of a group.
   US, idiomatic

Examples

“"Your course of action this past year has bordered on criminal negligence," he barks to the man whose job he means to take. "You're a weak sister, Mr. President."”

“San Antonio has always been viewed as the weak sister of the big regional centers of Houston and Dallas.”

CEFR level