Meaning of ACT UP in English
- ACT UP
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.
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012