Not be salt or water is a colloquial saying that is used to define a neutral person, whose reactions are neutral and that does not cause any kind of emotion to the of his around neither good nor bad
You NI chicha ni limona. Jauto. Soseras. Desustaciado. Sinsustancia. Pocasustancia. Aventao. Pajariquero. Unstable mental. Volandero.