go through thick and thin together
还有很多,比如：
share sb.'s joys and sorrows; partake in each other's joys and sorrows; share happiness and sufferings; share joys and hardships; share satisfactions and hardships; share the rough and the smooth with sb.; share weal and woe; share with sb.both prosperity and adversity; share with sb.sweets and bitters,weal and woe; take “for better or for worse”; through thick and thin
