Noun
sleep debt (countable and uncountable, plural sleep debts)
The cumulative effect of not getting enough sleep, especially as seen as able to be made up for by sleeping more than usual.
The gene also affects the sleep patterns of mice, and likely does so for all mammals. citation citation Sleep debt main Sleep debt is the effect of not getting enough sleep; a large debt causes mental, emotional and physical fatigue. Source: Internet
Sleep debt does show some evidence of being cumulative. Source: Internet