I don't like him/her/itUsed to say that someone or something is unpleasant or disagreeable to you. With food, it means that the food disagrees with you or makes you feel sick. The verb changes with tense, as in me cayó mal and me caía mal.
SP: No sé por qué, pero ese vecino me cae mal.
EN: I don't know why, but I don't like that neighbor.