[OldTee]

Why do they call it "Plastic Surgery"?
ARF

[Hunter]

Because you look plastic after it is done...............

[hoophead]

Because it takes a lot of plastic (the cha-ching kind) to finance it

[Lupin..the..3rd]

That's why.

[Jazzbass]

Oh, Wikipedia, is there nothing you don't know:

The word "plastic" derives from the Greek plastikos meaning to mold or to shape; its use here is not connected with the synthetic polymer material known as plastic. Plastic surgeons typically mold and reshape the following tissues of the body: bone, cartilage, muscle, fat, and skin.