That annoying person you cant really engage with who is a bit low on social intellegence. Usually a work collegue who likes to tell you meaningless stuff you don't care about. Cause to you they are a mung bean.
They kind of just sit there on the salad to add bulk, but no real substance. Sure they are okay, but they don't do much for you, and you don't usually seek out to put it on your salad. They aren't even that tasty. It is just a mung bean.