When a person arbitrarily describes item/places as stuff, things, and/or stuff-and-things simply because he/she expects you to understand his/her vagueness.
Or, when a person delibrately describes events with words like stuff, things, and/or stuff-and-things because he/she is too lazy and/or disinterested in fully narrating or recounting a situation.
A person pulling a Jayson will often often end his/her sentences with "...and things like that."
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.