weak sister

Meanings

nounweak sister (plural weak sisters)

USderogatoryidiomaticA person who is cowardly or indecisive.
"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."
1964, "Political Thriller" (film review of Seven Days in May), Time, Feb. 21
USidiomaticA person or thing which is the least robust or least dependable member of a group.
San Antonio has always been viewed as the weak sister of the big regional centers of Houston and Dallas.
1991 May 20, Larry Reibstein, “A Mexican Miracle?”, in Newsweek
Synonyms: sick man

nounA person or thing which is the least robust or least dependable member of a group.

Similar

Also see

Cite this entry

APA

weak sister. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/weak%20sister

MLA

“weak sister.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/weak%20sister. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “weak sister,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/weak%20sister.