不翼而飛 [－－－飞]

Jyutping bat1 jik6 ji4 fei1
Pinyin bù yì ér fēi

Definitions (CC-CEDICT)
  1. to disappear without trace
  2. to vanish all of a sudden
  3. to spread fast
  4. to spread like wildfire
Definitions (粵典–words.hk)
  1. 語句
    啲​物件​冇​端​端​唔​見​咗
    to disappear without a trace (for objects)
Definitions (Wiktionary)
  1. phrase, idiomatic, of an object
    to disappear suddenly; to disappear without a trace; to vanish into thin air
  2. phrase, idiomatic, of news
    to spread quickly; to spread like wildfire; to spread fast as if on wings
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）
Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #262