This is just 2012 written in Roman Numerals making it look so much more badass. This makes you also seem so much more intellectual than you actually are. Each "M" stands for 1000, the "X" stands for 10, and each "I" stands for 1 so 1000+1000+10+1+1=2012.
Hey man can you read this? I can. MMXII just means 2012, damn am I the only person that's smart enough to read this?
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.