What is Ing?
1.
Introduced in Metroid Prime 2: Echoes. Ing were born when a phazon meteor struck the planet Aether with such force that a dimensional rift created a dark version of the world (Dark Aether). This warring race seeked to destroy the light world and its peaceful sentients, the Luminoth. They are capable of possessing other creatures, allowing them entrance into that world; light is fatal to them otherwise.
In solid form, Ing are dark, spider-like creatures with five legs and several glowing red eyes (although they can be depicted as one big red orb like in the official art). They can also revert to a puddle of dark matter.
The Ing stole the "Light of Aether" from Agon's Energy Temple.
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2.
ing - a suffix used to form adjectives or verbs - in the ghetto language, the suffix -ing is hardly ever used. Instead, you can replace it with the suffix -in' or just -in. The sound of the g is eliminated.
Stop hatin' on VC!
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3.
The creepy health-sucking monsters in Metroid Prime 2: Echoes.
I was just killed by an Ing. Ahhhhh.