A more innocentway of saying 'shit'. Usually used in a sarcastic or funny way
A - (looking at snapchat) 'Oh my god, he's watching two horror movies, and it's a school-night!'
(Everyone else looks at each other)
B- 'Well holy shitnizzles, what a BADASS'
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.