A nickname used for someone with a first name beginning with the letter J. Some may make a joke that the person stabs and/or talks about stabbing a lot.
D-Dog: J-Blader pass me that knife. Byut don't stab me.

Josh: Dude i told you not to call me J-Blader.
by Mnayin May 1, 2009
Get the J-Blader mug.