Carry (someone's) water American verb phrase
It can also be phrased as "carry water (for someone)".
To always obey another person and serve everything they want you to do
If the employee does not want to be fired, he should carry the boss's water.
She always carries their water or will be bullied.
The verb "carry" should be conjugated according to its tense.
Many sources point to the late 1970s for the origin of this phrase.