by cock in ur face July 03, 2011
a term to replace the word f**k. can be used in the context of jeffing, jeffed up, jeffed over, jefficated, or jeff.
by cool.beans.bro. August 30, 2011
by Not your wife December 13, 2010
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.
by jfizzle4 October 25, 2010