crunchy (adj.)youdaoicibaDictYouDict[crunchy 词源字典]
1892, from crunch + -y (2). Student slang sense of "annoyingly intense about health or environmental issues" is by 1990, short for crunchy granola (considered as natural and wholesome); not entirely pejorative at first. Related: Crunchiness.[crunchy etymology, crunchy origin, 英语词源]