derived from humougous and a word that ends in cious(if there are any) could be refering to humoungous titties, but could also mean a very fat girl if you use it in context
Look at those hugocious titties i just want to suck on the and put my dick between them so i can nut in that girls eye.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.