(idiomatic) To get stimulus from (an external object)
It seems like her boss feeds off her unhappiness.
Feed-off Sentence Examples
These two will continuously feed off of each other's energy.
She brought him humans to feed off of and â€“ in the lean years where they'd been struggling to survive â€“ she let him drink from her.
The THC is also a major forcing of hurricanes, which feed off warm surface sea temperatures.
By setting up a birdbath near your garden, you invite in birds that feed off insects.
Attaching themselves to the human scalp with tiny claws, head lice feed off the blood of their human host and cause itching, scalp irritation, and chronic head lice conditions if they aren't treated promptly and properly.