pronounced no ness. used as exclamation for something you find unfair/shocking/what the hell. Useful for tricky situations where you might like to say something along the lines of 'Fuck off is that fair' but the audience wouldn't approve of that language!!!!
Oh my god, my phone isn't working anymore. Noness!!!
Teacher: Get out my classroom. Your behaviour is despicable
Student: Noness!!!
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.