act up

act upとは　意味・定義・例文

Phrasal verbs 句動詞

1. behave in a rude or unsuitable manner

暴れる, 無礼なふるまいをする, 似つかわしくない振る舞いをする

They acted up. ー Such conduct is unbecoming to you.

2. behave badly

騒ぐ, ふざける, いたずらする

The children always acted up when their parents was out.