straight face

I have to fight to keep a straight face.

Meanwhile, up the road from MIT at Harvard Business School, the latest business review asks — with a straight face — “AI Companies Don’t Have a Profitable Business Model. Does That Matter?”

"The idea of Alan, of all people, pulling off a masterclass in deception felt about as likely as him keeping a straight face through one of his own punchlines."

This is so obviously a market mania that I honestly don’t know how anyone on the Street of Shame can say otherwise and keep a straight face.

The others kept straight faces, but Carr couldn't manage it without dissolving into a fit of giggles.