汗牛充棟 [－－－栋]

Jyutping hon6 ngau4 cung1 dung3
Pinyin hàn niú chōng dòng

Definitions (CC-CEDICT)
  1. lit. enough books to make a pack-ox sweat or to fill a house to the rafters (idiom); fig. many books
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic, of books
    to be numerous
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）