It was one of his most famous expressions.

There was a long silence while he looked at me with his famous dead-pan expression.

Hymie was the first to use what became a famous expression throughout the school.

(Here Newton used what became his famous expression "hypotheses non fingo").

Aristides of Thebes - famous for his detailed and accurate facial expressions.

Noticing that this drew fewer laughs from the audience, he adopted his famous deadpan expression whenever he was working.

I mentioned at the outset a famous expression.

"It's a famous expression," the first woman explained with more than a trace of annoyance.

Ironically his most famous expression of the type theory, in a formula for bleaching powder, was later found to be wrong.