Focus on the pronunciation of buck
English definition of “buck”
buck noun [C]
make a quick/fast buck › often disapproving to earn money quickly and easily, especially by doing something illegal or dishonest: They're more interested in making a quick buck than helping homeowners find the right loan.
the buck stops here › used to say that you will make important decisions and deal with a problem, and not allow other people to be blamed for it: When it comes to company policy, the buck stops here.