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English slang expression which can be used as a noun or a verb:
1 Knock off (noun), an item intended to look like something it is not, such as an expensive watch or designer clothes.
Knock off (verb) can have a number of meanings depending on context:
2 to stop working for a short break;
3 to leave work at the end of the day;
4 to steal or remove;
5 to kill or severely chastise someone;
6 to try to get close to someone for romance or casual sex;
1 That piece of shit isn’t a Rolex, it’s a knock off;
2 Let’s knock off for a cuppa, I’m parched;
3 It’s gone five o’clock, let’s knock off;
4 I’m going to knock off a few pens from the office;
5 They’re going to knock off that fat bastard he’s really pissed them off.
6 I’m going to knock off that bird from HR;
by AKACroatalin April 19, 2015
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3
(n.) knockoff - a copy of an original brand, often priced dramatically lower than an authentic. Commonly, the designs will have been altered a bit, or they will appear the exact same, but some small detail may prove they are not authentic.

"Woah, a Dior wallet for $40.00? That can't be possible."
"It isn't. See? The interior isn't leather, it's plastic. And the stitching is loose and falling apart. It's definitely a knockoff."
by Ulrika May 30, 2006
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4
An item that looks exactly like an original product but lacks the expensive designer label and is replaced with a fake one. Usually costs half the price with half the style appeal.
I hate those Coach knock off purses with the little "G's" on them instead of little "C's"
by ~*erin*~ April 10, 2004
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5
Australian, to end the days work, to clock out.
2) colloq to steal
I knocked off work mate and seen some bastrad knocked off me car stereo.
by herbie August 31, 2004
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