heartbreaker

noun
UK /ˈhɑːtˌbreɪkə/
US /ˈhɑːrtˌbreɪkər/

A heartbreaker is someone who makes other people feel very sad because they stop loving them.

Everyone warned her that the handsome new boy was a heartbreaker.


OTHER MEANINGS

2. A person or thing that causes great emotional pain or disappointment.

The final loss was a real heartbreaker for the whole team.

3. A very attractive person who is likely to cause romantic heartache.

He was the school heartbreaker, and half the class had a crush on him.

4. Something extremely difficult or disappointing to deal with.

Losing the championship in the last minute was a heartbreaker.