(slang) Used to warn that something shocking, impressive, or intense is about to happen in a video or situation; originally a warning from Japanese anime about high energy levels ahead.

a particle, such as an electron or proton, that has been accelerated to very high speeds or energies

(bound form) high energy, especially in the context of physics or science

internet slang used to warn viewers of upcoming intense, shocking, or high-energy content in a video or post