bleeding heart
noun
Definitions
Any of various perennial plants, of the family Papaveraceae, subfamily Fumarioideae, often having pink heart-shaped flowers, including:
Flowering shrubs, lianas, or small trees of the mint family Lamiaceae, in the genus Clerodendrum.
The bleeding heart tree, Homalanthus populifolius, an Australian rainforest plant.
A person who is overly sympathetic to the plight of the underprivileged, exploited or helpless, or to casualties of circumstance.