giddy

adjective, gid·di·er, gid·di·est.

1. affected with vertigo; dizzy.
2. attended with or causing dizziness: a giddy climb.
3. frivolous and lighthearted; impulsive; flighty: a giddy young person.

verb (used with or without object), gid·died, gid·dy·ing.

4. to make or become giddy.

adjective -dier or -diest

1. affected with a reeling sensation and feeling as if about to fall; dizzy
2. causing or tending to cause vertigo
3. impulsive; scatterbrained
4. my giddy aunt an exclamation of surprise

verb -dies, -dying or -died

5. to make or become giddy