Inmates who may not be able to defend themselves and are often beaten or raped are known as

The correct answer is punks.
Prison punks are those people who are usually very submissive and willing to do whatever the other, more powerful inmates tell them to do. Those other prisoners might order them to work for them, to help them out, and they will often use them for sex, whether these punks want that or not is not important to them.

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