the buck [sing.] used in some expressions to refer to the responsibility or blame for sth:
It was my decision. The buck stops here (= nobody else can be blamed). • I was tempted to pass the buck (= make sb else responsible).
[Oxford OALD Dictionary]


Webster's Online Dictionary:
"The buck stops here" is a phrase that was popularized by U.S. President Harry S. Truman. It refers to "passing the buck," i.e., handing responsibility to someone else, and the fact that the president has to make the decisions and accept the ultimate responsibility for those decisions.
( http://www.websters-online-dictionary.org/definitions/The bu... )


the buck stops here - ja snosim (primam) konačnu odgovornost
[Bujas Ž., Veliki en-hr. rječnik]


the buck stops here - ovde se donose odluke, više instance nema
„Find out where the buck stops and go straight there“
- Predsednik Truman je na pisaćem stolu držao natpis „the buck stops here“
[Milosavljević B., En-sr. frazeološki rečnik]