acronym and euphemism for the phrase "Jacked and Tan" or someone who goes tanning frequently, wears limited clothing when working out, and emits a high level of personal vanity. Most "JNT" people are dbags who are very successful in picking up women, others such as metro sexual or Euro-esc or Euro-trash people get "JNT" to look good constantly.

When you eat dirt for the first time and leave your family to build a shack in the woods