A word, that unlike most urban dictionary words, isn't gross or perverted, that basically means whatever you want it to mean. It can literally mean a wide variety of things, but most of the time is used in place of the word "awesome".
That ride was pretty dangous! (in the form of Awesome).
Let's go to Dangous! (In the place of a city, or something).
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.