weak sister

weak sister

A weak, spineless, unreliable, or ineffectual person within a group or team. Don't worry, we reassigned him. The last thing we need right now is some weak sister dragging this case down. I knew everyone on the team thought of me as something of a weak sister, so I spent the whole off-season training and practicing.
See also: sister, weak
Farlex Dictionary of Idioms.

weak sister

a timid person, usually a male. It looks like Dave is the weak sister on the team. We've got to pull together and stop playing like a bunch of weak sisters.
See also: sister, weak
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

weak sister

n. a timid person, usually a male. Another weak sister and we’ll have to quit. We’ve got to pull together.
See also: sister, weak
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • (as) weak as a kitten
  • kitten
  • weak as a kitten
  • (as) weak as a baby
  • weak as a baby
  • can't punch (one's) way out of a paper bag
  • can't punch one's way out of a paper bag
  • couldn't punch (one's) way out of a paper bag
  • he, she, etc. couldn't punch his, her, etc. way out of a paper bag
  • weak
References in periodicals archive
Having been present at Fed Chairman Paul Volcker's meetings with the Fed's outside consultants, I heard them tell Volcker that the administration's policy was a massive fiscal stimulus and that, in Alan Greenspan's words, "monetary policy is a weak sister; at best it can conduct a weak rear-guard action." I saw that Volcker was not going to follow the Treasury's request to gradually reduce the growth rate of money, but in order to protect himself would throw on the brakes before any part of the phased-in tax rate reduction had gone into effect.
HAS SEASPAN BECOME THE WEAK SISTER OF NAVAL SHIPBUILDING IN CANADA?
As to my "weak sister" comment, I consider the .40-65 nearly laughable from an '86.
But Asia remains the weak sister of FIFA, despite having more than half the world's population.
IT'S been a long road to commercial application, but some experts believe that the perennial weak sister of enhanced oil recovery (EOR), the cultivation of production-boosting micro-organisms in the reservoir, is starting to show some strength.
Seen directly up against the first two, Part III indeed looks like the weak sister, but the problems are almost all conceptual rather than a matter of Sofia Coppola's inexperience or Al Pacino's hair.
Yet, despite the price, or lack of it, this is no weak sister.
In recent years, Miller has found itself the weak sister among the big three brewers, steadily losing share to Anheuser.
Pat's expertise in selling this sort of femme-oriented thriller could generate some opening biz, but this is a weak sister entry in the genre overall.
Here's their argument: If Germany becomes the ultimate backstop for EFSF funding and guarantees, and if the EFSF is forced to bail out not only Greece and the other "weak sister" countries but also Italy, Germany's debt/GDP ratio could easily reach 240 percent (compared to just 80 percent today).
Recent pronouncements from experts, pundits and industry observers assert that the Google Appliance is a weak sister in the behind-the-firewall search market.
The cartridge is seen as a weak sister for defense use.
"On-line services, which were a weak sister last year, have grown in importance...