smart ass

Noun

slang sometimes vulgar

(slang, sometimes vulgar) A person regarded with an obnoxiously determined advancement of one's own personality, wishes, or views.

Japanese Meaning

生意気な人。自分の意見や立場を、時に不快と感じられるほど強く主張する人物。 / 自己中心的で、押しが強く、自分を過剰にアピールする人。

Don't be a smart ass and just tell me what happened.

生意気な奴ぶってないで、何があったのか素直に話してよ。

Sense（1）

(slang, sometimes vulgar) A person regarded with an obnoxiously determined advancement of one's own personality, wishes, or views.

smart asses

（ plural ）