Someone that is such a dope fiend they ask to scrape your pipe and lick you empty dope baggies they pick their face when nothing is there and leave puss juices all over your mirror.
Doctor: I'm afraid your son has "The knack"
Mother: Can he lead a normal life??
Doctor: No. He'll be an engineer.
Mother: Oh no...
Doctor: There there.
Steven: Bro Knack sucks
John: Dude, shut the fuck up, you are so stupid, seriously. Knack is great.
Dunkey: KNACK 2 BABY KNACK IS BACK BABY Jim Johnston: HERE COMES THE MONEYYYYYY
By Darda
Knacking
Term used to describe pain and uncomfort. Chiefly used in Britain, more commonly in the North East of England.
Short/Slang of 'Knackers' / 'Scumbags' used in Ireland to define sketchy characters, who'll steal you clothes, money, and other possessions you have on you when walking through the cities of Dublin or Limerick.
Wear tracksuits, travel in numbers, and cary knives.