weak as a kitten

weak as a kitten

Feeble and fragile, as in After that bout with flu she was weak as a kitten. This simile has largely replaced weak as a cat, from the early 1800s.
See also: kitten, weak
References in classic literature ?
Them shakes leaves me as weak as a kitten, sir," he said, preserving finely that air of uncon- sciousness as to anything but his business a helms- man should never lose.