1. One who subjects to scamming or conning people. 2. One who plays runescape 20 hours of the day bullshits for 3 and bitches for 1. 3. An acronymn standing for jn=the first and last letter of justin con=the first part of con artist which he is.
Boy, Justin sure is a jncon he didnt have time to get a real girl so he took a runescape girl due to the fact that he had free cam acess and another person to scam.
by Teh 1337 tek December 7, 2004
Get the Jnconmug.