Meaning of the word "in the pink" in English

What does "in the pink" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

in the pink

US /ɪn ðə pɪŋk/
UK /ɪn ðə pɪŋk/

Idiom

in very good health or condition

Example:
After a long vacation, she's feeling in the pink.
The old car is still in the pink, running smoothly after all these years.