A couch on which one person dwells on for more than a day, often it becomes riddles with their scent. The person will often sleep/hang out/eat/play xbox/beat on the couch before his stay is complete. The duppa's inhabitant will often sleep through class while on the duppa.
"Get Maxx off that goddamn duppa. He's been there this whole week sleeping. He never leaves that thing."
A way to just state anythingyou would like, any time you like. “It’s duppin” and “it’s a dup” are common phrases with this used. When you just wanna speak, say that it’s duppin!
A karass of only two people, who are so bound together that even their children cannot invade their union. From Kurt Vonnegut's "Cat's Cradle." (A karass is a group of people bound together, often without externally discernable ties.)
“They were lovebirds. They entertained each other endlessly with little gifts: sights worth seeing out the plane window, amusing or instructive bits from things they read, random recollections of times gone by. They were, I think, a flawless example of what Bokonon calls a duprass, which is a karass composed of only two persons.”