My question is what is the Word or phrase for the following?
a weak person harming another (equally) weak person and both inflicting harm on each other in the process.
Warning: The next part contains f word.
Let me go into a bit of a background. Actually a friend asked me English alternative for a Punjabi saying. If I translate the exact words, it'll be something like this: one hungry person fucks another hungry person and as a result both faint.