Weak Sauce

Weak sauce is a term used to describe someone who is lame or weak. It comes from actual weak sauce that is not as good as hot sauce when put on food.

The term is often applied to a person but may also be used to describe a thing or idea that is underwhelming or disappointing. It is the opposite of awesome sauce, or awesomesauce, which describes something cool or, you guessed it, awesome.