weakest link

British  

noun

1. the person who is making the least contribution to the collective achievement of the group

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Etymology

Origin of weakest link

C20: from the British television quiz of the same name

Example Sentences

“Markets are looking for the weakest link out there.”

From Barron's

"He'll continue to harm British interests no matter how compliant we are and, like all bullies, he will always find the weakest link."

From BBC

"According to the stewards and the police, I was always picked on because I was the weakest link," said Haroun, who graduated from Manchester Art College.

From BBC

“Our export controls are only as strong as the weakest link,” Lawler, who sponsored legislation that would provide regulators with tools to deal with the vulnerability, said in a statement earlier this year.

From Barron's

"When it comes to political crises, it's mission impossible for members to give up sovereignty and give in to the Asean greater good," says Huong Le Thu, deputy of the Asia programme at the International Crisis Group, who adds that this was "Asean's weakest link".

From BBC