A command to tell someone to go away or leave them alone. The words themselves (neck and necker) are probably meaningless, though could be related to the older English phrase you've got some neck. Similar to buzz off, piss off, take a hike.
Neck off necker! Stop chooming me.
2π 8π
The term "off neck" refers to an individual whom is well experienced in the practices of 'Bad Eggatory'. Whenever "Off Ya Neck" , one finds themselves in situations that may be questionable , but require years of hard earnt and learnt street smarts to be able to hold ones head up high , and genuinely believe , that they have "got this shit" , no matter how intoxicated / beyond the point of soberness, that they may be...
"Off Neck"
Person One : "Cunt , You're off ya Fucking Neck!"
Person Two : "Yeah , Na , Na , Yeah , Yeah , Cunt , I've Fucking Got This Shit".
5π 2π
When you plan to get really drunk or the act of getting really drunk
Brian: Iβm feeling lively tonight, I think we should have a big one mate.
Ryan: Me too, Iβm thinking of *getting off necks*
Brian: Yes mate, ring Barry and the boys.. letβs *get off necks*