J

Jack Mormon
Once a term which referred to a non-member friendly toward the Church. Now refers to a Mormon who does not practice Church teachings and does not bother to conceal the fact, as by publicly smoking and drinking, or by having too much fun on a Sunday.
 
Jay Dub
Mission slang for a Jehovah's Witness. So derived from a shortening of the initials J.W.
 
joint, the
Underworld slang for "prison" (as opposed to simply "joint," which denotes a marijuana cigarette); e.g., "Got a joint, Gene?" "C'mon, Richard, where would I get any grass here in the joint?"

(C'mon, you must have known this already.)
 

Also by William Shunn

The Accidental Terrorist: A Memoir by William Shunn