Weak Link 

The one person, or 2 that alwyas is the bitch of the group and messes up all the time

that Thomas kid sure is a weak link

Weak Link by DigBick1000000 January 23, 2019

weak link 

That one person in your group who cant hang and breaks under pressure.

We all snuck into an R rated movie, except james, he left.

JAMES IS THE WEAK LINK

weak link by Hella_user August 4, 2014

Weak Link 

Anybody who drags you down, keeps you from thriving.

The males species is a weak link.

Weak Link by Trinitysisters March 7, 2019

Weak linking 

Verb. To intentionally add a poor policy, person, protocol or machine into a system for the purposes of sabotage

Indra just recommended a poor engineer to Tom so she can weak link his team and beat them at the company retreat

Jyn's father worked with the Alliance so he could weak link the Death Star on purpose for the Rebel Alliance

The party blew up over a row about affirmative action when Shino said it's weak linking the workforce for political gain

Weak linking by neoLinguistomorph October 1, 2018