In 2152, Malcolm Reed became pinned to Enterprise NX-01's hull by a Romulan mine. Fearing he'd be blown up by the mine, he asked Jonathan Archer not to sever the spikes that held him there. He added that, if he let Archer amputate his leg, Chef would serve "roast Reed" for Sunday dinner. (ENT: "Minefield")
In a figurative sense, cannibalism could also refer to stripping a piece of technology for parts to use elsewhere.
The Tellarite ship Tezra was seized by the Klingon Empire. Believing the vessel had been impounded, its owner, Skalaar, turned to bounty hunting in order to pay the impound fee. It was not until his last mission, in 2153, that he learned the Tezra had been cannibalized several years earlier. (ENT: "Bounty")