Meaning of ACT UP in English

ACT UP

(informal)

all children act up from time to time : MISBEHAVE, behave badly, get up to mischief; Brit. informal play up.

the engine was acting up : MALFUNCTION, go wrong, be defective, be faulty; informal be on the blink; Brit. informal play up.

2192; headword

Concise Oxford thesaurus English vocabulary.      Краткий оксфордский словарь английского языка тезаурус.