Cannibal Women in the Avocado Jungle of Death

From IMDB:

"The U.S. government, eager to protect the nation's avacado supplies, recruits feminist professor Margo Hunt to make contact with the Piranha Women, an all-female tribe who believe men are only good as a source of food. Accompanying Dr. Hunt on her trip are Jim, a guide of questionable competence, and Bunny, a student of unquestionable incompetence"

Dr Hunt is the one in the middle, with the knife (which is how you can tell she's a feminist.)   She's played by Shannon Tweed who a) is the wife of Gene Simmons from KISS and b) was raised on a mink farm.  I can't decide which of these facts I enjoy more.

The screenwriter, incidentally, was, JF Lawton, who also wrote Pretty Woman, and the story is more or less a re-telling of Jospeh Conrad's Heart of Darkness.