"The thing is, acoustic could be like a four-letter word to a lot of kids"

This quote by Billie Joe Armstrong is referring to the fact that many youths today are not thinking about acoustic music. To them, acoustic music is viewed as out-of-date and boring, and they would rather listen to more modern-day genres such as hip-hop or pop. Armstrong is suggesting that acoustic music must not be seen as a four-letter word, but rather as a vital part of music history that ought to be valued. He is motivating youths to check out acoustic music and to value its beauty and intricacy. He believes that acoustic music can be simply as pleasurable and significant as any other category, which it ought to not be neglected. By comprehending and valuing acoustic music, youths can acquire a higher gratitude for music as a whole.