attended with or causing dizziness: a giddy climb.
3.
frivolous and lighthearted; impulsive; flighty: a giddy young person.
verb (used with object), verb (used without object)
4.
to make or become giddy.
Origin: before 1000;Middle Englishgidy,Old Englishgidig mad (as variant of *gydig), derivative of godGod, presumably orig. “possessed by a divine being”
O.E. gidig, variant of *gydig "insane, mad, stupid, possessed by a spirit," probably from P.Gmc. *guthigaz, from *guthan "god" + *-ig "possessed." Meaning "having a confused, swimming sensation" is from 1570.