When someone is the victim of anonymous, fictitious allegations online that are contrary to their known personality and it results in invitations and Honors being retracted.
The "Uncle Timmy" incident was the start of the SJW push to de-platform non-liberals from conventions.
Usually used against someone who is not liberal.
Usually used against someone for something said/written that is perfectly appropriate when said by someone on the left.
"Hey, what happened to the Fan Guest of Honor? I heard Uncle Timmy was going to be here. He's helped so many authors that I wanted to meet him!"
"Well, someone took exception to a joke he printed that someone else submitted, so they uninvited him."
"Wow, so Uncle Timmy got "Uncle Timmy'd?"
"Yup"
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).