A noun meaning junior fat jesus, or entailing a smallish fat ass that has a similar appearance to jesus. Often used towards an obese kid that looks way older than their actual age. Characteristics include negligence of shaving facial hair, large consistent appetite, and the carrying of a satchel (man purse).
"Man Delilah looks like a JFJ
" I know, someone should tell her about the invention of the razor."
"I think she carries one in her satchel