the tobacco that is dumped from a cigar. when rolling a blunt you cut lengthwise down a cigar; when you slide/dump the tobacco out, it looks like fecal matter.
I'm breaking up the greens; you shit the blunt.
The ashtray was full of blunt shit and cigarette butts.
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.