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A term used to describe counterfeit goods of extremely high quality, so much so that they look identical to the authentic product.

Commonly used on r/fashionreps and among other counterfeit clothing communities.
Wow, Aooko’s β€˜Ray-Bans’ really are 1:1.

Just got some 1:1 Yeezy knock-offs from China.
by ultimateharibo June 12, 2018
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2
Short cut definition for a one-on-one meeting between an employee and their boss. Commonly used in the subject line of an email or meeting request. Not intended as a formal meeting to review one's performance evaluation, this meeting is often only 30 minutes and is conducted weekly or every other week.
I had my 1:1 with Kevin last night down on the first floor conference room.
by AndrewMcL June 18, 2009
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