the buck stops here
The ultimate responsibility is mine. A set phrase often used when the speaker intends to take action in a situation marked by indecision or inaction. This strike can't go on any longer, so the buck stops here—I will personally meet with the head of the union today.
buck stops here, the
I'll take full responsibility, as in You needn't call my boss; the buck stops here. This saying gained fame as a sign on the desk of President Harry S. Truman. It alludes to another expression that means the opposite, pass the buck. [Mid-1900s]