Boredly

Def. One: To be doing something in a bored or sluggish fashion.

Def. Two: A word that most people think is in the dictionary, and causes said people to become rather frustrated with the English language.

"Now we're moving on to Calculus!" the teacher said with enthusiasm.

The girl looked at her friend and groaned. "Yay," she said boredly, in a very sarcastic tone.