keep a straight face

He put his head on one side, but kept a straight face.

They turned to see me and I had to work to keep a straight face.

Sometimes it's more about trying to keep a straight face.

How can you say that and keep a straight face?

It was all I could do to keep a straight face.

If he kept a straight face it's better than I could do.

He is going to have to keep a straight face, and deal with it.

And can both of you keep a straight face while all this is going on?

She did her best to keep a straight face but it was no good.

Now, of all times, I have to keep a straight face.

"I want to see if you can keep a straight face."

Not even the chief justice could keep a straight face any more.

It took no small effort to keep a straight face.

I was having a hard time keeping a straight face.

I sort of nodded and tried to keep a straight face.

I smiled on the inside, but kept a straight face.

"You having problems up there?" he said, trying to keep a straight face.

She kept a straight face and said, "I will see you in this room, no matter how late it is."

She tried to keep a straight face, did pretty well for a few seconds, and then lost it.

The important thing on such occasions is to keep a straight face.

He tried to keep a straight face, but finally gave it up and laughed.

I had a little trouble keeping a straight face along about then.

Blade could not keep a straight face when the news came.

The Queen seemed to find it all she could do to keep a straight face.

I was able to keep a straight face while agreeing with most of what they said.