Person that has lots of cash and basically wastes it (usually in useless stuff or overpriced items)
Other: A person that pays more money than they should because they can
Example
A: Why dafuq did you buy this?
Paganini dude: cause I can
A: You already have one/You don't need it
Paganini dude: I don't give a fuck, in fact - I gave the seller 200$ more than the item is worth
A: WTF?!
Paganini dude: Hey, I bought this useless item for a crazy amount of money A: I swear I'm going to fu##ing Ki#l you
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.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"