A term used by those south of the Mason-Dixon line. Used to describe suprising or shocking situations (similiar usage as "what the fuck")
What in tarnation!?!?!? Where did that copper-headed rattle water moccasin come from?!?
by Ron Jackson May 13, 2003
When your an old country folk and is confused
Billy ray Cyrus: HANNAH! What in tarnation IS RICO DOING WITH THAT CUCUMBER???
by Uhhh.aclevername February 25, 2017