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"
Cigarette: Northern slang for a cigarette, used oft by mashed up mancunian ravers becasue of the resemblance of a hot(electric)stove to the end of a lit cigarette. Originated circa 1991 in the early halcyon days of the rave culture; we speculate during a drug fuelled hallucination by said manc.
'fuck me noel, i am bolloxed, is that a ciggy in your mouth, or the stove from me 'nans kitchen'/
General use: 'Give us a stove you cunt'