Jeffrey is usually used as a slang for Self-Improvement for someone that doesn't use his time to improve himself, and instead indulges in instant-gratification (Video games, masturbation, junk food, drugs etc...) and usually he also has poor mental health.
The antonym of Jeffrey in the Self-Improvement community is "Adonis"
- Emily: Omg guys!!! Gabriel is such a Jeffrey
-Gabriel: Hey!! Im not a Jeffrey!
by GalGameplays2.0 May 15, 2023
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Jeffrey is a very bright person not when it comes to school though. He's a black guy that hates pictures and never smiles because he thinks he looks ugly. He has good friends and Talks on discord. He can be a little forgetful and sends messages to the wrong person a lot (sometimes more than once). He finds the funniest memes and stuff on the internet and He helps his friends when they're sad.
"Hey did you talk to Jeffrey today?"

"No he told me to go away"

"Why?"

"Because his best friend was sad and he was helping her"

"Oh Ok"
by CreepyCrawlie0820 December 9, 2020
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English version of the Arabic name Jaffar, wich is translated: "Niserine's type" or "made only for Niserine"... mostly given to very tall, athletic and extremely smart and loving men especially when they are born goodlooking, that also happen to be very rich.
"Oh wow that guy is so Jeffrey, I wanna marry him" - a wild rose
by Lovewildroses November 23, 2021
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Jeffrey Denny is a very hot guy who is very athletic. Jeffrey is a nice guy with a nice hair and face. But sometimes he's just stupid. But follow his social media.
Jeffrey Denny is handsome, athletic, and very nice.
by JD Wade Jr. January 30, 2019
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A well known american serial killer and sex offender. He claimed that he killed around 17 people and kept parts of him victims with him(heads,arms.....) and ate some of them.
Bro this guy Jeffrey Dahmer was a monster. Kept a box of body parts at his job in his locker :o!
by lokumenia March 21, 2023
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Sounds like an asshole.
“Yo you know who Jeffrey Mcllvaine is?”
Naw man. Sound hella like an asshole tho”
by HabbiDaPuthy February 28, 2019
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Very hardworking ,cares about his and wife, loves vocabulary, very handsome
by Abbigayle Carey February 9, 2018
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