word of mouth
口碑；口頭傳達或推薦；通過人轉告或傳播
口語·描述口碑或口頭傳播
英文釋義
referring to information or communication that is passed orally from person to person
例句
The restaurant's success came from word of mouth, not from advertising.
典故來源
源自古代信息傳播方式，'mouth'（口）代表口頭傳遞，強調非書面或正式渠道的交流。