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.
by jevanyn April 22, 2011
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.
by heavy sleeper June 6, 2009