He is charging up his phone before leaving the house.

He charged up the hill with determination.

She was cracking up with laughter at the funny movie.

She cracks up every time she hears that joke.

He is banging up the old car in his garage.

She thought up a brilliant idea for the project.

She is thinking up a new business idea.

He checks up on his parents every week.

I checked up on my friend yesterday.

I am checking up on my friend to see how they are doing.