When you do really well at something in practice (like beating top players in Super Smash Bros. Melee), but fail to do it when it matters the most (like when you finally fight that top player in bracket)
Meleegamer123: "I beat Hungrybox on slippi! I'm so good at melee"
Meleegamer456: "No you aren't dude, that's just The Hbox Effect"
A "human" that spends so much time playing video games that their posture is level nerd neck. Everytime anyone goes tryhard they hunch down and their neck gets longer there fore a nerd neck is always hunched down cause they're always going try hard. In other words a nerd neck is a try hard, since their neck is 100% longer than the average human being due to playing too many video games and taking them serious, nerd necks are not even considered human anymore but something more sad. Nerd necks are often found on fortnite, their natural habitat usually being tilted towers.