回鍋肉

Noun

 * 1)  a Chinese dish
 * 2)  one who returns to the same state, place, person, position, etc. after a period away

Usage notes
Sense #2 can be used in a diverse range of situations, for instance it can refer to a person who is re-recruited by the same company after resignation, enters a new relationship after a divorce, participates in a talent show program after having achieved one's fame in another, etc.

Etymology
From.

Noun

 * 1)  a Chinese dish