ass omelette
An omelette made by injecting an egg mixture into one's anus, swirling it around, then expelling it into a fry pan. Normally, one eats the omelette with various spices, such as salt and pepper.
"Man, she made him the best ass omelette ever. Chives, spinach, feta, and all."
omelette ass
A cross between a bubble butt and a flat butt, shaped like a half moon.
I saw this girl in a bar and told her she had the greatest omelette ass I have ever seen...she took me home!