eg. in M*A*S*H, radar referred to workmanship as this. as having been worked on by many people than inspected by the people that mattered. I think it could mean jobs done by dummies then inspected by specialists and said to be good or bad.
The job is done but when examined by those who understand workmanshipmenship, it was found to be substandard.
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.