Used in casual or informal situations, not in formal writing or speech. I'm raring to see the new movie this weekend!
Pro Tip 2/3
Action Imminent
Suggests that someone is about to take action immediately or very soon. She's raring to present her project to the class tomorrow.
Pro Tip 3/3
Positive Excitement
Indicates positive feelings like excitement and enthusiasm, rather than just willingness. The kids are raring to open their presents on Christmas morning.