Sentence:  Sleeker, faster “muscle cars” were the rage, and so when DC Comics editor Julius Schwartz updated Batman in 1964, the Batmobile—the tank-like sedan with a bat-head grille—was <WSD>chop-shopped</WSD> into a sportier model. 
Meaning of the word marked with <WSD> tags:  To cut apart a car in a chop shop, either to sell as parts or to alter its appearance.