play dumb

The movie is otherwise too smart to be playing so dumb.

Better if he'd played dumb, he realized a few seconds too late.

We're getting our money, so we can afford to play dumb.

She once held up a power drill and played dumb.

He would play dumb, allowing her to carry them through.

He had to tie himself back up and play dumb when you got there.

The man seemed to have taken no action, but he might be playing dumb.

She decided to play dumb and shook her head again.

I decided against trying to play dumb and say "Who is what?"

If you're stopped by the pigs, play dumb and they'll just tell you to move along.