The remains of chewed gum thrown by people onto the floor (indoor or out) to which over a period of time, said remains of gum resembles a black pot hole, but without the hole. There currently exists specialized tools to remove gumpots, usually consisting of a long pole and a gillette type blade on the end to scrape them off the floor. However, gumpots are ubiquitous AND perpetual, around the world due to humans fixation and habits relating to chewing gum.
The train platform was littered with gumpots due to commuters discarding their chewing gum on the floor.
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?"