Act up
Act up verb - To behave badly.
Break down and act up are semantically related. in malfunction topic. In some cases you can use "Break down" instead a verb "Act up".
Break down
Break down verb - To stop functioning.
Usage example: the computer finally broke down and had to be replaced
Cite this Source
Break down and Act up. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/act_up/break_down
Act up & Break down. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/act_up/break_down>.
Break down or Act up. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/act_up/break_down.
Google Ngram Viewer shows how "act up" and "break down" have occurred on timeline