knock about

"There was a lot of money knocking about," he told ITV's Jonathan Ross Show.

The ruling had the effect of knocking about $16 million off expected income from the property owners.

But regulators turned down the request last month, knocking about 20% off Metro's share price.

It wasn’t a truant officer at his door, though — no one had ever come knocking about that.

There will always be twisted murderers knocking about, and Luther can't resist when they bait him.