いい気き

na-adjective, noun

easygoing; optimistic; conceited

Describes a person who is carefree, overly optimistic, or smugly self-satisfied. Often used in the phrase いい気になる (to become conceited or get a swelled head). The nuance can range from positive (relaxed) to negative (smug) depending on context.

• 彼かれはいつもいい気きな顔かおをしている。

  He always has a smug look on his face.

• いい気きになって調ちょう子しに乗のるな。

  Don't get carried away just because you're feeling good about yourself.