Unripoffable
"Unripoffable" when something is not within the capability of being ripped off. Most commonly, chord progressions (as they are not able to be copyrighted and are sometime used in thousands of songs)
"That Green Day song "Boulevard Of Broken Dreams" totally ripped off Wonderwall by Oasis"
"Nah, man. That's just the same chord progression, it's unripoffable!"
"Nah, man. That's just the same chord progression, it's unripoffable!"