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6.
Derivative of the Hebrew slang term Jeefah, meaning literally something gross and disgusting. Has been expanded to include figuratively as well as literally gross or disgusting or even distasteful.
1) Ugh, I've been hiking in the mountains through all these heat and humidity I feel so jeef right now.

2) Ew, did you see that dude pick his nose on the subway, JEEF!

3) I can't believe he cheated on his girlfriend, that is just so jeef!

4) What's that jeef that looks all slimey on the street?
by ShayaKNYC July 10, 2008
 
1.
god of ganja
jeef says "the future is green"
by Jeef Himself June 04, 2003
 
2.
Cannabis, pot, weed, grass, joy sticks, reefer, boo, smoke, dope.
Can you get me some jeef?
by Buzz Cola October 22, 2003
 
3.
To pick up a fat girl on her period and eat her pussy.
Guy #1: Dude, whats that red shit around your mouth. You didn't jeef that girl did you?

Guy #2: (wiping his mouth) Fuck off.
by Im A Bear July 10, 2012
 
4.
A term used to describe when one jizzes and qweefs at the same time.
Aw dude, I was fucking my boyfriend last night and I totally jeefed on the sheets.
by Col. Klink June 12, 2011
 
5.
A self-referential mistake or faux pas; a recursive error in judgment or behavior
First person: I have a b-b-bit of a st-st-st-stutter.
Second person: You are a walking jeef, my friend.

First person: I feel like I have to (fart)...
Second person: Dude, you just sharted and jeefed simultaneously!
by Danstrom March 15, 2010