same as layback
to chill out, calm down, relax and max often used when it's time to take a ride
"-heyy mayne! that mofucka lookin at me sideways ! who this? im gittin piiiissed, hand me the niiine!!!
-boy, why don't you shut the fucc up and lay on back for a while, you ain't gon killnobody, son
Something that is said to somebody in jest when they make a statement that is so outrageous, it would seem that their mind has been affected by the use of the psychedelic drug.