What is the meaning behind this? Please explain why this is the case or if this is true. What's all this about the company laying off staff? I never approved anything like that!Tommy, what's all this I hear about you failing your science class?See also: all, this
what’s all ˈthis/ˈthat (...)?
why is this/that happening?: What’s all this I hear about you wanting to leave?See also: all, this