Said when one has absolutely nothing
to say and has to say something as when you are daydreaming at an office meeting and suddenly realise that
all eyes are upon you and that
someone has asked you a question while
you were in la la land.
Angry policeman: "The whole building is on fire, the third floor has exploded, there
is absolute chaos everywhere, and I find you standing here with that
detonator in your hands. WHAT HAVE
YOU GOT TO SAY FOR YOURSELF!!??"
Guilty guy: "Nooty tooties"