act up

I started acting up simply to keep myself occupied.

In the early years, he said, he acted up, raking up disciplinary infractions that landed him in solitary confinement.

I told her the camera is going to be constantly running, so when she’s acting up — and I wanted to open the film with that — she knew that was being recorded.

One testified that Adams said he would never “take a kid’s word” over that of a staffer; another said Adams matter-of-factly passed along the advice he had received about beating kids if they acted up.

Second, the few who do act up end up arrested, despite Trump's insinuations to the contrary.