The phrase "loose change" refers to small amounts of money, usually in the form of coins, that are not neatly organized or held together. Full definition
Compared with some larger mining operations that can make several whole coins a day, that's the mining equivalent of looking for loose change on the sidewalk. (businessinsider.com)
Keep everything from your house keys to loose change in this decorative pot. (idealhome.co.uk)
It generally can be had for about fifteen dollars a month, which is roughly the amount of loose change you lose in the dryer each month! (effectivecoverage.com)