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A chorus in music would be a line or group of lines that you repeat in intervals during a song. They usually have the same exact lyrics but, in some songs, they have the same melody and everything, but the words are different.
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You can get rid of some hiccups by drinking lots of water, being scared, or holding your breath for a number of seconds. OR you can just wait it out, but there are many ways you can get rid of them and different methods work for different people.