Peristerizo is a Greek Verb.
It defines the forward-backward moving, that you make when you are walking. A lot of people make this move when they cross a street.
A car was close to kill me, when I was crossing Konstantinoupoleos, because I did peristerizo.
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.