Wiktionary
the buck stops here
phr. (context idiomatic English) (non-gloss definition: A statement that no excuses will be made, that the speaker is going to take direct responsibility for matters, rather than pass the responsibility to higher authorities.)
Usage examples of "the buck stops here".
One of your presidents, I was told, had a plaque on his desk that said: 'The buck stops here.
After all of them, all the old bogeymen who've been let off, allowed to go free, brushed under the carpet, kicked upstairs and even honoured for treachery - the buck stops here!
As one of my predecessorsa Democrat, unfortunatelysaid, The buck stops here.
He thought of Harry Truman: the buck stops here, here in this Oval Office, not in the more ornate office of the Secretary of Defense.