OMELETTE

US also omelet [noun] [C] - a savoury dish made by mixing together the yellow and transparent parts of an egg and frying it, usually with small pieces of other food"Do you fancy a mushroom omelette for lunch?" "I'd prefer a plain one, actually."(saying) 'You can't make an omelette without breaking (a few) eggs' means that it is hard to achieve something successfully without someone being hurt or upset.