Green’s Dictionary of Slang

1. (also JD) juvenile delinquent.

1957		P. Moore Chocolates for Breakfast 97: I felt like a J.D. or something.
1965		S. Yurick Warriors (1966) 82: An indignant voice said, ‘God-damned J.D.s’.
1973		in C. Browne Body Shop 144: In high school I started being a JD, I stole cars, robbed houses.
1989		N.Y. Times 2 Feb. n.p.: Known as a ‘J.D.’ (as in juvenile delinquent), a ‘druggie’ or a ‘pothead’ [R].
a.2003		mk1299 ‘Rev. of Teenage Bad Girls’ on Doctor Shock’s Drive-In 🌐 The gals also stage a make-out party when the parents are away, inviting the most pathetic group of overaged JDs ever seen on film to suck tonsils with them.

2. (US Und.) John Doe n.

1977

B. Davidson Collura (1978) 57: J.D. meant John Doe [...] In short, there were four J.D.’s who only Collura could find, and he was sent out to find them.

3. (also JD) Jack Daniels whisky.

1992		J. Mowry Way Past Cool 193: Both wore black shades to cover the aftermath of a quart of JD.
1999		R.G. Barrett Wind & Monkey (2013) [ebook] Les [...] hoofed his JD and ice.
2002		R.G. Barrett Mystery Bay Blues 92: ‘She’s not a bad sort,’ said Warren, sucking lustily on his JD.
2005		P. Howard Curious Incident of the Dog in the Nightdress 1: We’re talking straight JD here.
2008		Overclockers: Forums 22 Dec. 🌐 JD [i.e. Jack Daniels bourbon]] is bogan juice.