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abbreviation for nota bene: used to mark something as particularly important.
The party is tomorrow at 8.

NB: Dress in formal attire.
by Jordija May 3, 2004
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Abbreviation for Nota Bene ("Note Well"). Pedonator to Nojo, 10/29/09: It’s a wink-wink in the fine print: Pay attention to this, sucka.
NB: Trespassers will be shot on sight.
by JR in MA October 30, 2009
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Noun. NB (also Nb, nb, and the phonetic "enby") is an abbreviation for "non-binary" and denotes a spectrum of gender identities that do not follow the traditional gender binary expressions of "male" and "female".

NB is often used attributively to describe people who identify as non-binary and is also often used by those individuals to describe themselves.

**Important: NB is NOT to be confused with NB, which has its own listing; that's right, they're homonyms. Good times.

NB, The gender identity, is rarely expressed with periods, in part to differentiate it from the more commonly punctuated latin abbreviation for 𝘯𝘰𝘵𝘦 𝘣𝘦𝘯𝘦 but also as a matter of visual preference and in keeping with general LGBTQ nomenclature.
Urban Dictionary has not yet responded to my complaint regarding their existing definitions of "NB"; instead, this important category of gender identity and its distinction is being ignored as if it doesn't matter. How very interesting.
by Kali Yuga Swan Song December 6, 2019
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Abbreviation of Niu Bi, a Chinese slang for saying if something is dope. Its literal meaning is cow(niu) pussy(bi). Seen mostly on leetcode comment sections.
"return n>0 && 1162261467%n == 0"
"NB!"
by supportvectormachine August 12, 2019
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Used in text or messaging among people from Northern Ireland, it stands for No Bother pronounced as "No Baw" it's used in similarly to how "no problem" or "no sweat" is used.
Person 1: "You in the burn tonight then"
Person 2 :"Not tonight lad I've got work"
Person 1:"NB"
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An abbreviation for non-black. Used to describe someone that isn't a black person.
Nb people shouldn't speak over black people on black issues.
by Hollstein's Vamp June 30, 2021
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NB is short for no balls
Person 1: There's a large crowd over there
Person 2: Scream out fire, NB
by Idk look it up November 13, 2020
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