Bucks is American English Slang for Dollars.. "A FEW BUCKS." = "A few Dollars." "So the bus pulled away and I picked up 'A FEW DOLLARS' worth of spare change from the bottom of the driveway." "Spare change" = "A Small amount of Coin money"= "A few Pennies, nickels, dimes, quarters".. Often coin money left over from a Cash based transaction...

Bucks are dollars..the term comes from traders who dealt in buck (male deer) skin. A buck is a dollar though. Change that adds up to a dollar is a buck's worth.