mài​mìng

sacrifice oneself

卖命 (賣命) mài​mìng
sacrifice oneself verb
to risk or give up one's life, especially for an unworthy cause

I certainly don't want to risk my life for someone like him.

work tirelessly verb
to work extremely hard or slave away, often for an employer or a goal

He worked himself to the bone for this company for twenty years but didn't get the compensation he deserved.

Frequency

Movie subtitles
3.46 per million appears in 2% of films
Written text
1.28 per million

Sources

Definitions
CC-CEDICT