When two or more persons tags "fake" and ugly pictures of eachother, and the uglyness of the picture increases by time, making it more humiliating to the other person
These persons are often friends, and doesn't mean any harm to eachother, than having fun on eachothers behalf.
A is white
B is a asian
A tags B in ugly asian pictures
B responds to tag A in pictures of ugly ginger people.
A responds in tagging A in even uglier asian pictures.
and so on..
A: Why did John tag that ugly picture that's not you?
B: yeah know, we're having a facebook tagwar. Check out the pictures i've tagged him in!