Word Origin & History
O.E. dysig "foolish, stupid," from P.Gmc. *dusijaz. Meaning "having a whirling sensation" is from mid-14c.; that of "giddy" is from c.1500 and seems to merge the two earlier meanings. Used of the "foolish virgins" in early translations of Matthew xxv; used especially of blondes since 1870s.