HE ÓÄÀÐÈÒÜ Â ÃÐßÇÜ ËÈÖÎÌ
[n'e udarit' v gr'az' litsom]
Not to strike the mud with one's face.
To maintain one's dignity; to acquit oneself well; not to disgrace oneself; to try to appear at one's best.
Cf. To put one's best foot forward; to make a good showing.