the weak link

weak link

Someone or something considered inferior to the other parts of a group, series, or mechanism. The weak link in computer security is almost always the end user. Derek hardly ever comes to class, so I'm not surprised he was the weak link in our group project.See also: link, weak

the weak link

the point at which a system, sequence, or organization is most vulnerable; the least dependable element or member.See also: link, weak

the weak ˈlink (in the ˈchain)

the point at which a system or an organization is most likely to fail: She went straight for the one weak link in the chain of his argument.See also: link, weak