informal having a deliberately expressionless face
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use poker-faced in a sentence
Another, a 40-something woman with a Carol Brady flip, stares poker-faced at the screen.If Porn Isn’t Art, Does It Still Have a Right to Exist? | Michael Stabile | May 2, 2012 | THE DAILY BEAST
He just sat there, poker-faced, as the madcap pie-thrower set upon his boss.
"Just enjoying myself," Bloomberg answered, poker-faced and giving away nothing.
poker-faced Callahan showed nothing of what he must be feeling.Double Challenge | James Arthur Kjelgaard
And if it were that of a practical joker, the poker-faced quality of it was perfect acting.Direct Wire | Clee Garson