dé​cùn​jìn​chǐ

insatiable

得寸进尺 (得寸進尺) dé​cùn​jìn​chǐ
insatiable idiom
To not be satisfied with small gains and continuously demand more; to take advantage of someone's concession or kindness.

You must never give in to someone like him who always takes an inch and wants a mile.

Frequency

Movie subtitles
1.61 per million appears in 1% of films
Written text
0.779 per million

Sources

Definitions
CC-CEDICT