It's actually "Oh my god, that's/he's crazy(person)/wicked(situation)" "está" can be used as "(S)He is" if used without any precedent or by using a pronoun Ex: Usted está loco = You are crazy, El(la) está loc@/(S)he is crazy. Also used to call a situation crazy Ex: Orale, esto esta loco/ Wow, that's crazy... i don't know proper grammar words, if someone wants to help me explain "this" you're welcome/No se palabras de gramatica correctas, si alguien me quiere ayudar a explicar "esto", eres bienvenido.