乳臭未乾 [－－－干]

Jyutping jyu5 cau3 mei6 gon1
Pinyin rǔ xiù wèi gān

Definitions (CC-CEDICT)
  1. lit. smell of breast milk not yet dried (idiom)
  2. fig. immature and inexperienced; still wet behind the ears
Definitions (粵典–words.hk)
  1. 形容詞
    比喻​年幼​無知​，​心志​未成熟​；​毛​都​未​生齊
    too young and immature; "wet behind the ears"; literally: still smelling of breast milk
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    still very young; wet behind the ears
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    虽然Luciano可能已经是出类拔萃，但他还是乳臭未干。
    雖然Luciano可能已經是出類拔萃，但他還是乳臭未乾。
    suī rán luciano kě néng yǐ jīng shì chū lèi bá cuì ， dàn tā hái shi rǔ xiù wèi gān 。
    • Luciano might have the crowd behind him, but he's still wet behind the ears.