1. something that stirs up excitement, enthusiasm, or strong emotion
2. a person who wakes others up

Examples

• The coach’s speech was a real rouser that motivated the team.
• That song is always a crowd rouser at concerts.
• The political rally featured several rousing speakers and rousers.
• He served as the camp rouser, waking everyone at dawn.
• The comedian’s opening act was a rouser that got everyone laughing.
• Her presentation was such a rouser that the audience gave a standing ovation.