Zoe: "Hey, did you see that photo I tagged of you from last night?"
Rebecca: "Yeah, it sucked"
Zoe: "What, didn't you like it?"
Rebecca: "No, I had to shimmage that bad boy"
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.