It's a comedic bit that I know of from Paul & Storm:
If you're not keen on watching bad cellphone videos of live music, it's a comedic bit where idle banter is turned into a musical reference, sometimes obscure.
"Idle Banter is the name of my "The Rutles" cover band."
So, "Blank-ity Blank" is the name of my "The Coasters" cover band:
I thought I'd share, because I think it's funny. Maybe someone else will too? And maybe someone else will share their entries into the repertoire.