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Nur weil ich den Begriff nicht für selbsterklärend halte, Powerlevel im Nazikontext erklärt imUrban Dictionary:

A person's "power level" indicates how deeply someone has fallen into fascist ideology. Internet Nazis often advise each other to "hide their power level" when speaking to those outside the fold, so as to avoid scaring away potential recruits with overt Nazi rhetoric or symbols (milk before meat). When a person uses such rhetoric in a public setting, they are "revealing their power level". The phrase comes from the Dragon Ball media franchise (It's over 9000!), and is also generally used on 4chan to describe one's knowledge of a topic, usually "nerd stuff" (so, in a non-Nazi usage, "hiding power level" may refer to not revealing too much about one's knowledge of video games, comic books, anime and other topics).