biblical name (II Sam. viii:16), used as a mild expletive in American English from 1857.
Examples from the Web for jehosaphat
The third belongs to King Jehosaphat, and is small and unimportant; one might almost call it a mere block of stone.
The head o' the bar'l fell out, an' the bar'l, flour, an' all came down over Jehosaphat's head.
This Jehosaphat was king of that country, and was converted by an hermit, that was a worthy man and did much good.The Travels of Sir John Mandeville|John Mandeville
But for him I should now have my palace on the hill of Zion, and my soldiers be encamped in the valley of Jehosaphat.A King of Tyre|James M. Ludlow
In the valley of Jehosaphat we find many tombs of ancient and modern date.