Like it or not 'laziness' is an important part of the game now. Romantic notions of purity and originality are rightly being eroded by newer generations wiling to push the boundaries of socially constructed prohibitions limiting certain forms expression.
Appropriation in art is the use of pre-existing objects or images with little or no transformation applied to them.
The use of appropriation has played a significant role in the history of the arts (literary, visual, musical and performing arts).
In the visual arts, to appropriate means to properly adopt, borrow, recycle or sample aspects (or the entire form) of human-made visual culture.
Notable in this respect are the Readymades of Marcel Duchamp (leading to the films, paintings, gestures of Andy Warhol, Richard Prince, John Baldessari, Damien Hirst, Jeff Koons, Sherrie Levine) etc...
http://en.wikipedia.org/wiki/Marcel_DuchampAll of the above appropriated from the interwebs...