1. most dizzy or lightheaded
Usage: superlative form of giddy
2. most excited or elated in a silly way
Usage: superlative form of giddy
3. most frivolous or lacking seriousness
Usage: superlative form of giddy

Examples

• She felt giddiest when spinning around on the playground.
• The children were at their giddiest during the birthday party.
• He became giddiest after hearing the good news about his promotion.
• The roller coaster made her feel the giddiest she had ever been.
• Among all her friends, she was the giddiest about the upcoming concert.
• The medication made him feel giddiest in the morning hours.