When someone takes something so far that it becomes nerdy. This happens in a couple of ways:
1: is when someone defines or corrects you with dictionary like precision.
2:When someone makes somethign that should be simple and makes it into something really complex by adding longgggg ass names to it
Guy : "Hey, let's go jump off that diving board"
Nerd: " Watch me do a triple backflip while rotating at 2.4 m/s at 57 degrees south of west, and land in the water creating a splash radious of exactly 3.4256 meters...."
Guys: " Uh.... nvm this guy is nerding it up, peace "
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.