Up above, in the comments, @joshperry says:
Perhaps the reason you are thinking of the 80-90s timeframe is because this plot line is very similar to the first book from Piers Anthony's Bio of a Space Tyrant series; Refugee.
When I read the question, I immediately thought of that book. It was written with very vivid visuals, so I can definitely imagine it being mixed up with a movie.
Here is what happened in the book:
A bunch of refugees on a space ship. They had a ton of problems; at one point were boarded by pirates. The pirates killed all the men on the ship and raped all the women. They put all the men outside the ship attached to a tow cable. After a while, the refugees were staving to death, and they slowly brought the bodies in tow back onto the ship and ate them.
While this does not precisely match details of the question, it matches to a certain extent the title question.
Here is the Wikipedia Link