病從口入 [ㄅㄧㄥˋ ㄘㄨㄥˊ ㄎㄡˇ ㄖㄨˋ; bing4 cong2 kou3 ru4] Illness enters by the mouth (idiom). Mind what you eat! fig. A loose tongue may cause a lot of trouble. ◄ ►