be at (one's) beck and call

be at (one's) beck and call

To be completely compliant or obedient to another person; to cater to one's every need. The phrase has a negative connotation. Primarily heard in UK, Australia. A: "How can we get to the mall this weekend?" B: "Oh, my sister will take us—she's been at my beck and call ever since I caught her sneaking in past curfew!"
See also: and, beck, call