Adjective
Giddy (comparative giddier, superlative giddiest)
1.
Dizzy, feeling dizzy or unsteady and as if about to fall down.
2. Causing dizziness: causing dizziness or a feeling of unsteadiness.
3. Lightheartedly
silly, or joyful elated
4. (archaic) Frivolous, impulsive, inconsistent, changeable.