FizzBuzz is a game where two players go back-and-forth counting by ones, and saying the number you counted to, unless if it's a multiple of 3 or 5, where you say "Fizz" or "Buzz" respectively. However, if a number is both a multiple of 3 and 5, you say "FizzBuzz." A common interview question for coders is to ask them to code FizzBuzz, which will quickly filter out the people who can't actually code. Tom Scott made a good video on it: https://youtu.be/QPZ0pIK_wsc
