Chad Calder's definitions
The number of hours over 8 that one sleeps resulting in a negative effect on the initial 8.  Thus, 11 hours of sleep will leave you feeling like you only slept 5.
by Chad Calder June 26, 2007
 Get the Anti-Sleepmug.
Get the Anti-Sleepmug.  Get the Anti-Sleepmug.
Get the Anti-Sleepmug.