同“ 乳臭小子 ”。 宋 俞文豹 《吹劍四錄》：“錢到，則雖乳臭小兒、庸鄙粗材、不識方脈、不識醫(yī)書，姓名亦皆上榜?！薄肚迤缴教迷挶尽る惔ㄊ掕≠H霸王》：“爾乃乳臭小兒，焉敢對眾謗言，以絶吾之祭祀！”《二刻拍案驚奇》卷五：“乳臭小兒，如此驚動天聽，又煩圣慮獲賊，直教老臣粉身碎骨，難報萬一?！?/p>

1.a youth, with the smell of his mother's milk still on his lips; A boy still has the smell of his mother's milk.; You're scarcely out of the shell yet!