A one-meal dish with egg as the main ingredient, add some cheese or milk and other desired toppings, mix well, then fry till golden brown, fold into half and serve. Originally French, now it's known internationally. Toppings can include ham, capsicums, tomatoes, mushrooms, sausages, etc. Extremely popular for breakfast or a light meal.
"'Ow about we all come back to mine and we can 'ave a French, English, Irish, American, Korean omelette, oui?"
"A guy invited me back to his for an omelette last night. Ended up having a big orgy with loads of his friends. It was strange though, because he didn't cook me any eggs in the morning..."
Omelette is used, (as in Lee Nelson's well good show) to encourage peer pressure. If you state that you are going to do something, such as dropping a meaty steamer on your mate's pillow, and another calls 'Omelette', you must adhere to your initial proposition. Failure to do said task will result in the Omeletted individual having to cook a tasty Omelette for the person who called Omelette.