The acronym for "That Just Aint Right." Common text message or blog abbreviation.
I'm as opened minded as the next guy but TJAR what Luther did with that gerbil.
by Truckdriver March 21, 2010
A t-jar, is any object used to cover your dick when you have a boner.
Paul used a t-jar when Siera and Lauren came over to watch movies.
by Siera&Lauren January 02, 2008