perder un tornillo

Examples:

ES: Donna está a 2 ó 3 días de perder un tornillo.
EN: That way the two stories don't get mixed up.
ES: Wow, me siento tan loco, ¡voy a perder un tornillo!
EN: You can't go back on your word later, huh? Mom, when do you want me to start?
ES: Sí, pero probablemente no cuando tengo una adolescente histérica volviéndose loca por una plaga de piojos y estoy a punto perder un tornillo.
EN: Yeah, but probably not when I've got an hysterical teenager freaking out about head lice and I'm about to do my nut!

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