act up   (TTS Sound)

The act_up has 2 Senses.

• act up, carry on
• misbehave badly; act in a silly or improper way; "The children acted up when they were not bored"
• 悪い振る舞いをする

• act up
• make itself felt as a recurring pain; "My arthritis is acting up again"
• 断続的な痛みを感じさせる