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."

With: "knacked that"
"I knacked her ya know?"

"I PROPER knacked her."

"Can't believe I knacked her/that"
by Rixta1010 May 18, 2018
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Belfast derivative of 'Knock'. Usualy said by a spide.
I'll knack yer ballacks in!
by Desigol December 20, 2004
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He knacked me. He was a good knack.
We were going at it, it was so good. Al I can say was knack me harder.
by Mergodfather January 25, 2023
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1. To be scolded, told off(see bollocking).

2. To be in pain.
1. I forgot my homework so my teacher knacked me.

2. I hit my hand off the wall and it knacked(If it's hurting at the time you say it is "knacks").
by Clive Warren March 19, 2009
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"knacking"refers to knacker drinking i.e the craze of middle-class Irish teens to go drinking in fields and on beaches."on the knack"is an expression to indicate whether someone decides to "fuck the pub,the owner has enough money" and make like a true viking and go drinking in the wilds.This practice ids highly illegal and half the fun is eluding the "fuzz"(police) and getting pissed for half the price with a perfect view of the sunset.It is also preferable to teens as they have the ability to 'listen to music they actually like' outdoors rather than have to listen to "disco biscuit muzak" in clubs and "mid-life crisis tunes" in pubs"
"hey man,are you heading to the stores(nightclub) tonight?"
"nah,fuck that,man,michael tierney(the owner)has enough money.Me and the lads are going knacking on the beach.We'll get twice as much drink for our money and listen to music that we actually like for a change.Ah,sure,you know yourself it's better to go viking style"
by Wezsez April 15, 2008
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Knack, ones state of being full after snacking out while smacked(Being high as shit).
by Reed Nagga Reed July 15, 2010
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One who is of the lame variety,
A Bitch,
Punk ass lame
Person 1: hey you know mike?
Person 2: yeah he's a knack!

Use by peckerwoods in the California state penitentiary.
by Beefy2316 January 5, 2020
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