What's the dilly?

What's the dilly?

slang What happened, is happening, or is going to happen? Why did something happen or is someone acting a certain way? ("Dilly" is likely a colloquial pronunciation of "dealy," itself a humorous, informal form of "deal.") You seem upset—what's the dilly, yo? So, what's the dilly? Are we heading straight to the movie or do you want to grab dinner first?

What’s the dilly?

interrog. What’s going on?; What’s the deal? (Dilly is a pronunciation of dealy.) Who’s shouting? What’s the dilly?