Harum-scarum
Pronunciation : Har"um-scar"um
Part of Speech : a.
Etymology : [Cf. hare,v. t., and scare, v. t.]
Definition : Defn: Wild; giddy; flighty; rash; thoughtless. [Colloq.] They had a quarrel with Sir Thomas Newcome's own son, a harum-scarum lad. Thackeray.
Source : Webster's Unabridged Dictionary, 1913