無茶

Etymology
The kanji are, literally meaning "tealess".

Adjective

 * 1) absurd, nonsensical, unreasonable
 * 2) excessive, extreme, exorbitant
 * 3) rash, reckless

Noun

 * 1) absurdity, nonsense, unreasonableness
 * 2) excessiveness, extremeness, exorbitance
 * 3) rashness, recklessness