A particularly stinky gaseous emission, deadly if inhaled for my the a second or two.
Did someone fart?. OMG, it's a JEFF!
A term used to describe a complete loser. A "Jeff" could be someone who wears cheap or tacky clothes, someone who is socially awkward, a loner, or just a complete asshole. Jeff can also be interpreted as a more specific version of krog.
hey check out that jeff over there with the roller-backpack and Obama t-shirt
Jeff works for the urban dictionary help center
he gets aggravated really quickly and was really mean to me
"Jeff wouldn't let me talk to NANCY"
1: (noun) An endearing but slightly moronic person. A waste of space, but in a nice way.
2: (verb) To waste time, to Jeff.
1: Rachel is a big jeff.
2: Rachel spends most of her time jeffing around to the sound of radio 4