1) A person who is exhibiting one or more of the following symptoms or habits: sleep deprivation, indifference to the world, lack of motor skills, no motivation to exist on earth any longer, poor decision making, and the occasional urge to kill yourself. Becoming knacked out is usually a result of intense mental or physical duress over long periods of time.
Sexual slang (U.K, East Midlands, South Yorkshire, Lancashire (localised) :When men brag to their mates about sex with a very attractive women.
EG:
"I can't believe I knacked her"?
Anecdotally lying or exaggerating popping a girls cherry.
E.G:
"I knacked her ya know?"
Or similarly gloating about "breaking in" or "destroying" a supposed virgin (slang for wild, kinky, hard or just passionate sex) a woman known to be classy, and/or hard-to-get (usually to other lads). Or anal sex with a women :
"I PROPER knacked her!"
Conventionally among friends being deliberately as innapropriate, forthcoming or sexist, common as possible by replacing: "Knacked her."
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.
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.