fnf syndrome 

A rhythm game term, when a person is used to how Friday night funkin' typically charts its song by giving frequent breaks that they don't have enough stamina compared to the difficulty of the patterns they can hit

This idiots plays way too much Friday night funkin' and now he's got fnf syndrome like look they Full combo the first 30 seconds then proceed to die within the next 10.

fnf syndrome by equACHOO-,sorry its equinox October 5, 2023

UGC FNF Syndrome 

If a game or form of media gets popular, ROBLOX UGC creators will exploit this and make their own ROBLOX accessories based off of it. This is named "UGC FNF Syndrome" because of the massive explosion of "Friday Night Funkin" (also known as FNF) inspired ROBLOX UGC accessories. These ROBLOX accessories are typically low quality and rushed.

"Dude, this game has serious UGC FNF Syndrome problems. Too many people have made accessories copying this game's ideas.."

UGC FNF Syndrome by EnderTheFrick August 27, 2022