To Infuse out is a tactic used by monks in PvP, primarily Heroes' Ascent whereby the monk using Infuse Health repeatedly uses that skill to lower their health until they can be easily killed right before they would be resurrected. After being resurrected, they will return revitalized with full health and energy.
This tactic is commonly used on King of the Hill matches to keep their Ghostly Hero alive while he has captured the altar. The Infuser will be resurrected on the captured altar and be ready to continue keeping the Ghost alive.
Ideally, a monk should be carrying a -20 health offhand and a vampiric weapon to force their own death if the other team or teams are neglecting to target them.