giddy
gid-dy
adjective
Feeling dizzy and unsteady, as if about to fall or faint.
"He felt giddy after standing up too fast."
adjective
So excited or happy that you behave in a silly, lighthearted way.
"She was giddy with excitement for the party."
Thesaurus
Synonyms: airheaded, dizzy, featherbrained, lightheaded, light-headed, frivolous, empty-headed, silly, vertiginous, ill, woozy, sick