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.
by t series < pewdiepie October 30, 2018
 Get the Jeffymug.
Get the Jeffymug. 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.
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."
Macdaddies employee: "That'll be $32.09 at the window"
Me: "Damn, that's over two and a half Jeffies."
by Taylor Roberts May 2, 2006
 Get the Jeffiemug.
Get the Jeffiemug. Guy 1:yo have you watched the new jeffy video?
Guy 2:dude how old are you?
Omegle stranger disconnected
Guy 2:dude how old are you?
Omegle stranger disconnected
by Xbox live generated username July 18, 2020
 Get the Jeffymug.
Get the Jeffymug. Someone who is kind and loving. Someone that you can trust and who always has your back. A word that means love, trust, and happiness.
You are a true jeffy.
I jeffy you with all my life.
You're are my jeffy, heart, and soul.
I can really jeffy you with my secrets.
I'm so jeffy right now I can hardly speak.
I jeffy you with all my life.
You're are my jeffy, heart, and soul.
I can really jeffy you with my secrets.
I'm so jeffy right now I can hardly speak.
by missme_questionmark January 21, 2013
 Get the Jeffymug.
Get the Jeffymug. jeffy hates green beans his daddys the tooth fairy oot oot oot if you try to steal his bike he will whip your ass
jeffy stop it
by beat perrington 6 to 5 June 6, 2018
 Get the Jeffymug.
Get the Jeffymug. A hot nickname for a guy. Also very cute one. He is funny and strong. He surprisingly fast for his height...
by Marisol.R April 9, 2017
 Get the Jeffymug.
Get the Jeffymug. "Hey bro, you see that new Praxis Kickstarter?" ... "Yeah, man, I pounced on that shit instantly. Top Tier!" ... "You're such a fucking Jeffie!"
"That new RPG Kickstarter last night ... I Jeffied that shit quick!"
"That new RPG Kickstarter last night ... I Jeffied that shit quick!"
by zeroprep August 2, 2018
 Get the Jeffiemug.
Get the Jeffiemug.