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euphemistic slang To masturbate. My ultra-religious aunt scared us silly when we went through puberty with all sorts of myths about what would happen if we touched ourselves.
See also: touch
touch a (raw) nerve
To evoke a strong emotional reaction, such as anger, sadness, or disgust, upon being encountered, heard, read, etc. Your column must have touched a nerve, because we are getting slammed with feedback from readers—and they're not happy. I could tell he was touching a raw nerve when he brought up Jane's former employer and Jane went silent for a moment.