In basketball, Drop a Dime or "Dropping a Dime" is a slang term that refers to making an assist, which is a pass that leads directly to a teammate scoring a basket.
The phrase originates from the era of payphones when a call cost a dime, so assisting someone with a phone call was "Dropping a Dime".
In the same way, a player who makes a precise pass to set up a basket is assisting their teammate.
Players known for frequently "Dropping Dimes" are praised for their passing ability and knack for making their teammates better.
Some of the NBA's greatest point guards like Magic Johnson, John Stockton, and Steve Nash were renowned for their prolific "dime dropping" throughout their careers.