- giddy; reckless.
Origin of harebrained
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for hare-brained
See a timeline of their hare-brained schemes—including sticking credit cards to their foreheads—and assorted misdemeanors.The Quaids’ Guide to the Fugitive Life
The Daily Beast
October 19, 2010
He’s just finished shooting a remake of Absolutely Fabulous (that hare-brained, alcoholic ‘90s Britcom).Arrested Development Meets Saturday Night Live
April 19, 2009
Harris made a hare-brained attempt to rescue her single-handed.Tonio, Son of the Sierras
He said to himself that he was every bit as thoughtless as their hare-brained guide.In Quest of Gold
Alfred St. Johnston
You are serving the King with these hare-brained Gascons, are you not?Cyrano de Bergerac
Nothing could restrain the hare-brained and ungoverned crew.Pioneers Of France In The New World
Francis Parkman, Jr.
What hare-brained scheme have you got in your mind now, Brent?Men, Women and Guns
H. C. (Herman Cyril) McNeile
- rash, foolish, or badly thought outharebrained schemes
Word Origin and History for hare-brained
also harebrained, 1550s, from hare-brain "giddy or reckless person" (1540s), probably from hare, on notion of "flighty, skittish."