lǎng​lǎng​shàng​kǒu

catchy

朗朗上口 lǎng​lǎng​shàng​kǒu
catchy expression
easy to sing and remember; flowing naturally off the tongue, typically of lyrics or slogans
recitable expression
easy to read aloud or recite fluently, especially due to pleasant rhythm or rhyme in poetry and prose

Frequency

Movie subtitles
0.450 per million appears in 0% of films
Written text
0.422 per million

Sources

Definitions
CC-CEDICT