a term used by small town white girls that are (despite their suburban upbringing) somehow incredibly hood, to let someone know that said white girl is going to call a black guy from the projects with an AK-47 and have said black guy do bodily harm to whomever she is pissed at. best if used in conjunction with the smashing of offender's phone.
white girl: "you cheatin' on me bitch?? aw hell no! imacall muh nigga E on yo cracker ass!"
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.