testeria

rare uncountable

(rare) Behavior exhibiting excessive irritability, aggression, or unreasonableness.

Japanese Meaning

過度な怒り、攻撃性、不合理な振る舞いを示す状態や行動

During the meeting, his sudden testeria disrupted the discussion and made collaboration impossible.

会議中、彼の突発的な激しい苛立ちと攻撃性が議論を乱し、協力を不可能にした。

Sense（1）

(rare) Behavior exhibiting excessive irritability, aggression, or unreasonableness.