from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A game played without having conceded a goal.
Sorry, no etymologies found.
I took a clean sheet of paper and one of those pens with an extrafine point.
Imagine what a mess the jet engine would be if Sir Frank Whittle and Dr Hans von Ohain, its two independent inventors, had been forced to abide by a rule that said: ‘You are not allowed to start with a clean sheet on your drawing board.