brainish
1. [ adjective ] characterized by undue haste and lack of thought or deliberation
Synonyms: impetuous impulsive madcap tearaway hotheaded
Examples:

"a hotheaded decision" "liable to such impulsive acts as hugging strangers" "an impetuous display of spending and gambling" "madcap escapades" (`brainish' is archaic)

Related terms: archaism incautious
Similar spelling:   brownish
  brainwash
  Briones
  brainwashed
  braincase
  Bruins
  Brinks
  brainchild
  brewing
  Breunig
  brain_scan
  Brinson
  Branigan