The word "wuss" is a slang term used to describe someone who is seen as weak, cowardly, or lacking in toughness or bravery.
Sentences with «wuss»
I personally don't want a bunch of wusses running around with a box of hankies to pass out to the other team after they tackle someone hard, lol. (sbnation.com)
Sadly, I was a total wuss when it came to introducing myself to any of the luminaries. (writerunboxed.com)