make a fast buck
make a fast buckand make a quick buck
to make money with little effort or in a short time. Tom is always ready to make a fast buck. I made a quick buck selling used cars.
make a fast/quick buck(American & Australian informal)
to earn money quickly and often in a way that is not honest
Usage notes: A buck is an informal word for a dollar (= a unit of money in America).Times are hard - you have to make a fast buck wherever and however you can.