the plural of what. When more than one thing is involved, what-all represents all that is associated with something. People who say you-all typically also say what-all.
by Roger Hoppe December 18, 2006
The Scotland Yard motto, according to the Simpsons (Season 16, Episode 1, "Treehouse of Horror XV," 7:55).
"Hey, what do all those British investigators say all the time?"
"They say, 'What's all this, then?'"
"They say, 'What's all this, then?'"
by CSFarnsley February 20, 2021
int - The official Motto of Scotland Yard. Used to question the happenings at a scene. Also a very uppity way of asking "What's going on?"
Phil: Evenin', mates.
John: Evenin', Phil. Blimey! *shoots Phil*
Policeman: Right, what's all this, then?
Snob A: Good evening, old sport.
Snob B: Right, what's all this, then?
John: Evenin', Phil. Blimey! *shoots Phil*
Policeman: Right, what's all this, then?
Snob A: Good evening, old sport.
Snob B: Right, what's all this, then?
by Justin Briggs September 26, 2006
by Nephele April 21, 2019
by BigBoySaucy August 07, 2018
by The Man. February 21, 2005
by Goose with a goose brain July 14, 2020