朗朗上口 [－－－－]

Jyutping long5 long5 soeng5 hau2
Pinyin lǎng lǎng shàng kǒu

Definitions (CC-CEDICT)
  1. to flow right off the tongue (of lyrics or poetry)
  2. to recite with ease
  3. catchy (of a song)
Definitions (Wiktionary)
  1. phrase, idiomatic, of poetry or phrases
    flowing off the tongue with ease
  2. phrase, idiomatic, of music
    catchy