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]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.