yǐn​yǔ

argot

隐语 (隱語) yǐn​yǔ
argot noun
secret language or cant used by a particular social or professional group to exclude outsiders
codeword noun
a cryptic word or phrase used for secret signaling or hidden communication

Frequency

Movie subtitles
0.060 per million appears in 0% of films
Written text
0.209 per million

Sources

Definitions
CC-CEDICT