The act of screwing someone over badly - having concealed your
true motives by lying and keeping secrets, then suddenly dropping the bomb out of the
blue. Joshing is a specific kind of deceit where you try to blame other people by using their outrage as incriminating evidence while getting rid of any evidence pointing to you.
Honorary mention just popped up in xkcd comics.
Famous people who claim to have been "Joshed" include
O.J. Simpson and Robert
Blake.
Dude 1: O.J. Simpson totally did it!
Dude 2: No man, he was totally Joshed! Can't you see it's all just a big conspiracy to keep
black actors out of Hollywood?
Dude 1: Wow, man. My boss kept telling me I would keep my
job, but he just fired me out of the
blue and then used my angry response to justify it to my co-workers.
Dude 2: Damn, that's a bad piece of Joshing!!