A night that starts with the partially used, leftover weed, inside a bowl (bong, blunt, joints) from another time prior to that night. A group of people will commonly try to get as high as they can off the leftover weed for fun.
Brent : "I don't have any money for Friday night."
Brennan : "Yeah neither do I."
Brent : "Oh shit, how we gunna get weed?"
Brennan : "Don't we have those potovers from Saturday?"
Brent : "Oh yeah!"
Brennan : "Lets get super high off that....man."