同“ 乳臭小子 ”。 宋 俞文豹 《吹剑四录》：“钱到，则虽乳臭小儿、庸鄙粗材、不识方脉、不识医书，姓名亦皆上榜。”《清平山堂话本·霅川萧琛贬霸王》：“尔乃乳臭小儿，焉敢对众谤言，以絶吾之祭祀！”《二刻拍案惊奇》卷五：“乳臭小儿，如此惊动天听，又烦圣虑获贼，直教老臣粉身碎骨，难报万一。”

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!