nooty tooties
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"
Guilty guy: "Nooty tooties"