JNT means in slang: A synonym and euphemism that refers to the expression “Jacked and Tan”, which is someone who tans often, doesn’t wear much clothing while working out and has a lot of vanity. People who call themselves “JNT” are usually dbags, but are successful at picking up women. Others such as Euro-esc or Eurotrash persons can “JNT”, and look great. (in Slang Dictionary, added by Gavyn Mcmahon)