唾面自干tuò miàn zì gān

人家往自己脸上吐唾沫，不擦掉而让它自干。指受了侮辱，极度容忍，不加反抗，也指人不知羞耻。

英drain the cup of humiliation; extreme obsequiousness as one who in spat on the face and let dry without wiping;