Use 'giddily' to describe actions done in a very happy or excited manner. He giddily tore open the present, anticipating the surprise inside.
Pro Tip 2/3
Light-hearted Moments
'Giddily' fits best in casual or informal contexts where formality is not required. The audience giddily applauded the comedian's hilarious performance.
Pro Tip 3/3
Avoid Seriousness
Don't use 'giddily' in serious or solemn situations; it conveys levity not suitable there. They giddily celebrated their last day of school, not thinking about the exams.