The phrase "impressed look" is correct and usable in written English.
You could use it when someone is expressing admiration or approval for something. For example, "His friends could not help but give him an impressed look as he finished his presentation."
And as the photo here indicates, they'll do their best "not impressed" looks.
When Callahan scored on the team's second shot late in the period to tie the game, the I'm-not-impressed look on the face of Coach John Tortorella said it all about the team's start.
Naturally I confronted them about it, halting their child's progress with a foot on the front bumper, loudly berating their crass behaviour while impressed pedestrians looked on, cheering and punching the air and chanting my name until Audi boy's parents fell to the ground, clutching pitifully at my trouser-legs and sobbing for forgiveness.
It's easy to imagine some impressed relative looking down at baby Jeff in his reinforced crib and declaring, "That kid's gonna be one helluva arm wrestler". .
2.19pm GMT The Slovenian coach is shaking his head; he does not look impressed but it was the right call.
And David Cameron, who must have heard all this stuff often, sitting next to Osborne, managed to look impressed, as if he could not quite believe this cornucopia of good news.
Let's think, for a moment, about the clay tablets that date from around 3200 B.C. on which were etched small, repetitive impressed characters that look like wedge-shape footprints that we call cuneiform, the script language of ancient Sumer in Mesopotamia.
Either way, smile and look impressed — it's the thought that counts!
I pretended to look impressed and got in, as a jazz club and more toilet visits awaited!
