尼玛收起那假惺惺的狗脸
[ní mă shōu qĭ nèi jiă xīng xīng de gŏu liăn]
An impolite expression telling someone to stop being hypocritical, literally commanding 'Nima (a rude expression) tuck away that false, sly expression'. Note this is considered impolite in public discourse.