The phrase "carry water for" typically refers to doing something for someone else that is pleasing or beneficial to them, often without personal gain. Some synonyms for this phrase include "brown-nose," "kiss up," "suck up to," "cater to," "pander," "flatter," and "fawn over." These actions are often driven by a desire to gain favor or to be seen in a positive light by someone else, rather than an inherent desire to help or be of service. While there may be instances where carrying water for someone is necessary and helpful, often it can be seen as insincere or manipulative.