A period ranging from 0:00:00 to 23:59:59 depending on age, gender, marital status, amound of homework, inebriation, and many other factors. Often simply defined as the tome one goes to bed, although there is some dispute as to whether this meant getting into bed or actaully turning out the lights, closing the eyes and attempting to sleep.
racist term for asians refering to their eyes
"Hey Bob i need help with my math."
"I'm sorry i only know up to advaced calculus, why dont you go ask bed time for some help."