Top definition
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.
by Jesse Colburn March 04, 2008
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2
Something you accumulate whenever you don't sleep an adequate amount on a given night. In the ghetto they call it "slizzeep to da dizzebt".
If sleep debt was dollars, yo' mama would be a rich bitch.
by Nick D March 17, 2003
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