To form or produce bubbles. The water began to bubble as it reached boiling point.
To rise or move in a way that resembles bubbles. Laughter bubbled up from the children playing in the park.
To express or show emotion or excitement in an effervescent manner. She bubbled with enthusiasm as she talked about her new project.
To be in a state of activity or excitement. The city was bubbling with anticipation before the big event.