bed gravity 

An irresistible force that draws you back to bed, or toward any mattress, couch, or other soft horizontal surface. Usually stronger when one or more persons are already on said furnature.

Mom: Time to get up for school!
Son: Must! Fight! Bed gravity! ZZZZZZZZZZZZZ

bed gravity by jevanyn May 13, 2011

zero gravity bed

Any bed that has foam and air in it and when you adjust it to 60 degrees you get the zero gravity position like nasa astronauts.

I was chillin in the zero gravity bed.

zero gravity bed by heavy sleeper June 6, 2009