weak sister

See more synonyms for weak sister on Thesaurus.com

noun Informal.

a vacillating person; coward.
a part or element that undermines the whole of something; a weak link.

Origin of weak sister

First recorded in 1855–60

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for weak sister

chicken, weakling, invertebrate, jellyfish, softy

British Dictionary definitions for weak sister

weak sister

noun

US informal a person in a group who is regarded as weak or unreliable

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012