weaker than water

one who is quite weak, lack of muscle, or mental and or intestinal fortitude.

You are weaker than water, you can't even lift the bar!

weaker than water by ocobb November 29, 2007

weaker than well water 

When something is very weak. Likely originated from illegal alcohol distillation culture where low alcohol batches were said to be "weaker than well water"

This cheap plastic toy is weaker than well water.

weaker than well water by smzkty October 2, 2013