An offensive and quite possibly racist term used to degrade people native to mesoamerica. Mud refers to the mud they might use to build houses and towns. Turkey refers to the headdresses made from feathers that the native tribespeople were observed to occasionally wear.
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.