A puppet owned (about to be disowned) by a man who refuses to pay bills. Jeffy doesn’t stop spanking his diaper. Kids name Noah commonly act as Jeffy for a VERY LONG period of time.
Jeffy: oo oo mr.pooper man

I don’t even know
by microppintightpuss October 23, 2019
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The single greatest human being alive. Always on Omegle or ChatRoulette, a sweetie all around, but kinda goofy and obsessed with sex. Has troubles answering his phone, or Skype. Very easy to love, very very hot, and someone you never wanna let go of. Don't ever lose your Jeffy or you'll lose your heart. <3
My god, did you talk to Jeffy last night on Skype?

Yeah, but he didn't answer until the third time.
by SomeSwagOrSomething September 1, 2010
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Jeffies are opioid analgesic medication synthesized from opium-derived thebaine. In other words any form of opioid medication. Usually in the form of but not limited to; oxycodone or hydrocodone. Many name brands of "Jeffies" are; Oxycontin "The King Jeffi", or weaker forms of "Jeffies" sch as Loraltab or Percocet. Other forms of "Jeffies" are such forms of opioid such as methadone, codeine, morphine, and even on some cases heroin. The name "Jeffi" derives from the people who sell drugs like these. When buying such drugs you have to deal with low life's that aren't legally named "Jeffi" but just look like they should be. This is from things like being overweight and having bent up glasses and being over medicated on Jeffies at all times.
Hey man you wana celebrate and grab a couple jeffies and watch a movie?" or "Dude im so jeffied right now I don't know when I'm asleep or when I'm awake its crazy brah." or "Man I love Jeffies but I hate Jeffi.
by Da Beaks January 20, 2011
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Friend 1- "So have you hooked up with that girl yet?"

Friend 2- "Yeah, she finally gave me a jeffy yesterday"
by pbny July 16, 2011
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the dude who is on crack and is high and like to hit his dick all the time and ask for money so he can stuff it in his diaper and the definition of cancer who DOES NOT like peas and he can rap like a motherfucker
jeffy dad get me a cheerio box jeffy so I can stick my peepee in it

mario why
by THE SWAG NIGGA 05 January 2, 2019
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Jeffy is a character on the youtube channel SuperMarioLogan. He is a puppet that has helped grow his channel and is a very popular character among kids between the ages of 9-12. Jeffy has not only attracted a positive fanbase but also a negative. Jeffy is known for smacking his diaper, having a bicycle helmet on and a pencil in his nose. He hates eating green beans and curses a lot.
Did you see the new Jeffy video?

Yeah!
by t series < pewdiepie October 31, 2018
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A twenty dollar bill.

First contrived by a man who believed that Jefferson appeared on the twenty. But as we all know Jackson is the president who face dons the twenty. We still use the term today to mock this man.
Man that date was expensive... I almost had to drop an entire Jeffie.

Macdaddies employee: "That'll be $32.09 at the window"
Me: "Damn, that's over two and a half Jeffies."
by Taylor Roberts April 21, 2006
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