to keep a straight face

When she told me that she fell in the mud, it was difficult for me to keep a straight face.

but of course he never did. How Harry managed to keep a straight face during these performances is quite beyond me.

All in all, the experience made it hard for me to keep a straight face when people referred to whale as a "delicacy. "

KM: We laughed our way through that Charlie's Angel's spoof. It was hard to keep a straight face. It felt like an office party.

They tend to keep a straight face all day long and fail to keep life in perspective.

He has such a strange voice that it's difficult to keep a straight face when he's talking.

One patient said, "I'm trying to keep a straight face. "

Stop joking around. I'm trying to keep a straight face.

She looked so ridiculous it was hard to keep a straight face.

trying hard to keep a straight face though her tears never stopped from streaming down.

And how Henry managed to keep a straight face, I'll never know! '

How Henry managed to keep a straight face, I'll never know.

It's hard to keep a straight face when someone tells a funny joke.

Barbara tried to keep a straight face, but in the end she just couldn't help laughing.

It's hard to keep a straight face