1 definition by Trizzzz

Its is to be lost in space, to have very little brain function and have no awareness of what is going on around you. Commonly happens when a person is stoned/and or driving.
Person One: "Did you hear what I just said?"
Person Two: "No sorry I was gapping out"

by Trizzzz April 8, 2006
Get the Gapping Out mug.