Definition & Meaning of "no johns"in English

What does "no johns" mean in gaming slang?

This term originated in the "Super Smash Bros." community, specifically from a player named John who frequently made excuses after losses, turning his name into shorthand for any excuse. Today, it is used to indicate that there are no excuses allowed after losing a game, meaning the winner does not want to hear about lag, bad controllers, tiredness, or bad luck. Players typically say "no johns" either seriously during competitive matches to call out whining or jokingly among friends to trash talk.