kǒu​tóu​chán

catchphrase

口头禅 (口頭禪) kǒu​tóu​chán
catchphrase noun
a favorite expression, mantra, or stock phrase frequently used by an individual

问题口头禅

méi wèn​tí shì de kǒu​tóu​chán.

"No problem" is his catchphrase.

zen cant noun
a Zen Buddhist expression repeated mechanically without true understanding

Real practice is not about repeating catchphrases; it lies in inner enlightenment.

Frequency

Movie subtitles
1.76 per million appears in 1% of films
Written text
1.93 per million

Sources

Definitions
CC-CEDICT