lǎo​diào​yá

decrepit

老掉牙 lǎo​diào​yá
decrepit expression
extremely old or physically worn out

That ancient tape recorder is barely working anymore.

outdated expression
obsolete, clichéd, or out of date

This obsolete theory has long been overturned by modern science.

Frequency

Movie subtitles
2.74 per million appears in 1% of films
Written text
0.396 per million

Sources

Definitions
CC-CEDICT