man-eater

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. An animal, such as a tiger, that eats or is reputed to eat human flesh.
2. n. A cannibal.
3. n. Slang A woman who is considered dangerous or threatening to men.

Century Dictionary and Cyclopedia

1. n. A cannibal.
2. n. In India, a tiger that has acquired a taste for human flesh; a tiger supposed or known to have a special propensity for killing and eating human beings. The name is sometimes extended to the lion and the hyena, on the same supposition.
3. n. One of several kinds of large sharks supposed to be specially formidable to man; specifically, Carcharodon rondeleti, a very large shark of the family Lamnidæ. This shark has straight narrow triangular teeth, very slightly serrated or crenulated, in both jaws. The body is stout and fusiform, with a pointed snout; there are two dorsal fins, one large, between the pectorals and the ventrals, the other small and posterior; the anal fin is like the second dorsal; the caudal fin is crescentiform; and there are five branchial apertures, all in front of the pectorals. It has been found 40 feet long, though it averages so much less that 13 feet is a good size. It is a shark of the high seas, found in nearly all tropical waters, frequently passing a considerable distance both northward and southward. Teeth much like those of the living species have been found in the Pliocene and Miocene deposits, as well as in the ooze of the Pacific ocean, indicating individuals that must have been about 80 feet long.
4. n. The dobson or hellgrammite.

Wiktionary

1. n. An animal that has a reputation for eating humans, such as the tiger or shark.
2. n. A cannibal.
3. n. by extension, slang A woman with a threatening attitude, often readily taking and discarding male romantic partners.

GNU Webster's 1913

1. n. (Zoöl.) One who, or that which, has an appetite for human flesh; specifically, one of certain large sharks (esp. Carcharodon carcharias syn. Carcharodon Rondeleti); also, a lion or a tiger which has acquired the habit of feeding upon human flesh.

WordNet 3.0

1. n. large aggressive shark widespread in warm seas; known to attack humans
2. n. a person who eats human flesh