A quick Google search shows this snippet at the top of the search.
“In the military, a separation code of "JKK" signifies a discharge due to misconduct related to drug abuse; essentially meaning the individual was discharged from service because of a drug-related offense.
Key points about JKK:
Meaning: Misconduct (drug abuse)
Where to find it: This code appears on a DD Form 214, which is the document detailing a service member's separation from the military.
Impact: A discharge with a JKK code is considered less than honorable and can significantly affect a veteran's benefits and future employment opportunities.”
It doesn’t mean drug abuse in the same way he isn’t bald or how he is actually professionally successful or how he is lacking in any personality disorders.
You come off pretty nuts there Bhankins.