8-10=-2 Share definition Flag The unwritten motto of all schools. They see that students should get 8-10 hours of sleep but read it as -2 hours of sleep. Quinn - I've got 14 hours of homework to do in 12 hours. School - Well, 8-10=-2 hours of sleep is all you need. Quinn - Shut the fuck up. 8-10=-2 by itsace May 31, 2020 Get the 8-10=-2 mug.