by cock in ur face July 4, 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. September 1, 2011

by Not your wife December 14, 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
