sleep debt
lack of sleep, or when you owe yourself some rest becasue you have been too busy. 

when you are not getting enough sleep, and need to calculate how much you owe your body

sleep account is negative, or in the red

first used by British airways 
and also sited on multiple occasions by lifehacker.com

i've been gathering some serious sleep debt since i have started pulling these all-nighters on a regular basis.