A term coined by YouTuber shadypenguinn, used primarily by UK secondary school students used to describe banter that is exciting or important, usually because of its offensive or inappropriate nature.
Did you hear about Dan and Chloe?
Yeah, man. Proper shadybanter, ain't it m8?
Eminem's political party, a "convention" yet more of a concert for the album Encore by Eminem where Donald Trump spoke for the political party. (not a real party by the way)