A combination of the Spanish "otra" (meaning other) and "schizophrenia" (a situation or condition that results from the coexistence of disparate or antagonistic qualities, identities, or activities). "Otraschizophrenia" indicates a psychological condition in which someone treats other people as though they are interacting with two different people
Girl 1: I don't get it. He's so nice to me, but then he treats me like a pet when others are around!
Girl 2: He's got otraschizophrenia... You should talk to him about it