Is An Idiot is the screen name of an unidentified person who played the arcade game Thunder Volt and scored 25310 points. The name is shown on the game's leaderboard in Dog Days.
When Greg shows Rowley his high score, he takes notice the person in second place and bets they were jealous that they were just ten points from beating Greg.[1] Greg then proceeds to unplug the game to wipe out the scores, but ended up burning the scores onto the screen permanently.
In the Wimpy Boardwalk Island in Poptropica, there was a member exclusive mission where the player had to beat "Is an Idiot"'s score to remove the insult on the scoreboard.