Adding -ing to the end of a word to start an idiotic new trend in order to take some idiotic pictures to get attention from other idiots who will follow.
Douche number 2: Thats old! Owling is whats in!
Douche number 3: No way. You guys are so 2 weeks ago. cone-ing is the shit now.
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.