Someone who does not workout their legs at the gym. Referred to as chicken legs.
Damn bro, you haven't worked out legs. Stop being a Jeffrey.
by Pimpwiththelimp December 24, 2016
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A blunt with a huge amount of drugs in them (crack cocaine,Heroin ,Ecstasy,etc.
Jessica was smoking a Jeffrey at the party last night
by BIGGPImpinnn July 12, 2011
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A customer who walks out on a sales deal. A dim-witted customer. A dead beat customer. A really bad Jeffrey is called a Jeffrey Jeff Jefferson.
That customer walked out on my deal. Boy did I get Jeffrey'd!
That guy was a real Jeffrey... Dude, that guy's name is Jeffery Jeff Jefferson!
by rexpo March 20, 2012
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Similar to a 'Spliff', a jeffrey consists of many other drugs including marajuana, crushed up E's, opium, Heroine, Angel dust etc. There is not a set drug ratio for the Jeffrey it is decided by the producer of the Jeffrey.

Recently featured in the new movie Get Him to the Greek.
A Jeffrey
by Natedawg18 June 27, 2010
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The sweetest guy you'll ever meet. Even when he's having his own problems, he'll try to solve yours. He's funny and knows how to cheer anyone up. He'll do whatever he can to help and you can always count on him for whatever is going on in your life. He is an amazing guy and you're lucky if you ever meet him. He also pulls off sweater vest and cardigans.
person: who was that guy he was such a stud!
person: must have been jeffrey
by ahs... January 27, 2013
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To Jeffrey something is to wait until the last possible moment to address a problem, generally waiting until something is /literally/ on fire before dealing with it. Derived from jefferies tubes in Star Trek; small access tunnel routes in starships generally only accessed for emergency repairs.
"Wow, I can't believe Steve would jeffrey it up like that - I don't know how he thinks he'll have it done in time."
"We were all working on our parts super far ahead of time, but Ralph decided to jeffrey his portion so we ended up only getting a B-"
"Look, I'm not usually one to jeffrey things, but this week was ROUGH, so screw you for looking down on me for dealing with this now instead of before!"
by MagykBob July 2, 2021
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