jabrodie, jabronie: slang for a stupid person. Interestingly the Wrestler / actor The Rock who trained early in his career in Pennsylvania used this term frequently when wrestling. Also heard pronounciations as in "Joe Jabro"

"Tommy is a jabronie who needs a smack in da face"

J'ardville: Girardville, the town east of Ashland.

Jeepers Pelts!: expression of frustration or dismay. Possibly has a vulgar or sacrilegious connotation. 

Jeet yet? No. D'joo?: very common coal region expression asking about eating food.

 "Did you eat yet?" "No. Did you?"

Jeez God: expression of surprise or awe. 

"Oh, Jeez God, dat is a bee-you-dee-full car!"

Jeezus, Mary, and Joseph! (also sometimes expressed as Josephine): an expression of surprise or anger. Used when saying "Jeezus!"