What does 'sic' mean When written in a sentence like the slipknot song.?

Answer 1

[sic] is used when you quote something someone else said, in the exact same way it was said or written, even if it contains incorrect (or no longer used) spelling. it is used to state that you know it's incorrect, but hey that's how the dude wrote it! or to point out the mistake, in case the reader hadn't noticed (like "Lol, look how this loser spelled "tonite"!")

Also, you can use [sic] when you want to spell something wrong on purpose. in that case it means "Dude, don't correct me, i know it's incorrect but that's how i like it!"

Answer 2

That means the misspelling was in the original text.