the c slur is chink, not ching chong, ching chong is used for mocking asians . the c slur “chink” is used against chinese ppl , not js any asian person, chinese ppl can reclaim it - a chinese person
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.