definition of
brainish

[1] #1 brainish s. [hotheaded, impulsive, impetuous, madcap, tearaway] characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; ('brainish' is archaic). wn