It is a quote made by lillie in pokemon sun and moon.
Lillie: get in the bag nebby
Nebby: Pew

Lillie: ok listen up here you stupid bitch, if you wont go in the fucking bag right now il punch the stupid out of your fucking face. will you still be that happy then!? probally fucking not you fucking cosmic gay cloud.
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1) an expression used to tell someone that they are fat

2) an replacement for fatass
samson:"You are a fucking nebby"
barbs:"...what?"
by Kisomedino February 12, 2022
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Smol legendary Pokemon. Master criminal. Evader of bags everywhere.
by 4 4 August 9, 2021
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A master of guitar and a beast on melees on decks.
Woah it’s so big you must be a nebby.
by Nebby222 May 24, 2021
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Lil Champ's own personalized way of saying, "Be". The Rapper of the Century uses the word like an abbreviation, in both his music and in the real world. Often times in places that it wouldn't fit at all if somebody with over 7 brain cells tried to use it. But who really cares? Nobody. Fuck it he's the rapper of the century. Here are some examples:
by NebbyJaymes December 5, 2021
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Nebby is slang from Pittsburgh,Pennsylvania that means nosy.
Ruth: Why did you and Emily break up?

Jonathan: Stop being nebby and mind your business.
by ThatBitchWithTheBigBoobs August 6, 2021
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