turn off; jack in(I'm going to jack in my college course after the vacation, it's too much like hard work — Završiću s mojim kursom na koledžu posle raspusta, previše je to težak posao); jack it in(I'm going to jack in my college course after the vacation, it's too much like hard work — Završiću s mojim kursom na koledžu posle raspusta, previše je to težak posao); kibosh