the act of placing an item for sale online but then forgetting about the post and subsequently ghosting all interested parties by not responding to any messages of inquiry
These guys aren't responding to me on Facebook Marketplace about amps for sale. They be postin' n' ghostin'...
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.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"