cannibalise

To eat (parts of) another of one's own species.

The female black widow spider is known to cannibalise the male.

To remove parts of (a machine, etc) for use in other similar machines.

to cannibalize an old laptop for parts

According to our correspondent, at least one of the Type 2s has had to be cannibalised to facilitate repairs, as spares are often in short supply.

To reduce sales or market share (for one of one's own products) by introducing another.

iPad mini to cannibalize 1M full-size iPad sales.

Rework old material; rehash.

When the album succeeds, such as on the swaggering, Queen-esque “Nothing’s Gonna Stop Us,” it does so on The Darkness’ own terms—that is, as a random ’80s-cliché generator. But with so many tired, lazy callbacks to its own threadbare catalog (including “Love Is Not The Answer,” a watery echo of the epic “I Believe In A Thing Called Love” from 2003’s Permission To Land), Hot Cakes marks the point where The Darkness has stopped cannibalizing the golden age of stadium rock and simply started cannibalizing itself. And, despite Hawkins’ inveterate crotch-grabbing, there was never that much meat there to begin with.