Sarcastic retort used in response to a comment that somebody has used to induce excitement or shock. Used with a sense of irony, in saying "woop-de-do", or even "woop-de-freaking-do", the second party is expressing indifference or mild annoyance at the content of the comment made.

Also used when one has excitedly passed on a piece of relatively unenlightening information.

Analogous with "so what", "oh wow!", "who cares", "big deal" and "o rly?".