Some People Call Them the Space Cannibals 

Some people call them the eaters of maaaan.

In dire circumstances, humans will usually resort to cannibalism. Still, we’re not really supposed to talk about it. If we are going to talk about it, more precise language would be best. “Space colonists would likely turn to cannibalism in desperation”, rather than “Space colonists will likely resort to cannibalism for funsies”.