I'm not sure who is responsible for the idea, but an interesting idea that I learned from Laurie and Ken Kranyak, of Bay Village (Cleveland suburb), Ohio, was helpful in reaching a slam that the opponents missed in Gatlinburg, and it got us into the right slam.
The idea is related to the "Walsh Fragment" jump rebid, where, for example, a 1C opener jumps to 4C after a major response to show a solid club suit, four-card major support, and game values.
The Kranyak Jump Reverse could be seen as a flawed Walsh Fragment bid, artificially showing a long minor (6-card, but not necessarily solid) and a fragment (3-card) support for partner's major. In other words, both the fit and the minor may be "flawed" from a Walsh Fragment perspective.
The jump reverse shows this hand. So, for instance, after 1C-P-1H-P-?, Opener could jump to 3D, a jump reverse, as an artificial bid to show three-card hearts, six clubs, and obviously values to justify forcing the three-level in the possible major Moysian, 3NT, or four of his minor. It is still a big bid, but flawed as not a pure Walsh Fragment bid.
The Gatlinburg hand was a classic hand. After 1D-P-1S-P-?, I jumped to 3H with KJx-Kx-AKxxxx-Qx. Partner held Axxxx-Axx-QJxxx-void. It seems like the slam should still be bid by anyone, but you can also see how easy it was for partner after I jumped to 3H, which we defined as showing what I held.
The Kranyak Jump Reverse can be used in two simple auctions: 1C-P-1H-P-3D and 1D-P-1S-P-3H. The third auction is 1C-P-1S-P-3D or 1C-P-1S-P-3H. These two options for the third auction suggests that there should be a difference between bidding 3D and bidding 3H. Perhaps you agree to bid the shortness, if you have shortness. Perhaps you make your cheapest cuebid (bid 3D if you have the Ace, King, stiff, or void in diamonds; bid 3H if not -- surely you have one control). Perhaps one jump reverse is weaker and the other stronger. Whatever (my preference would be for a cue).
The call is relatively rare, but it does come up if you play enough. If you are actually reading a bridge blog on cuebidding, you probably play enough, or at least think theory enough, for this to be useful. LOL I have noticed that the Kranyak Jump Reverse has "answered" a few forum problem hands. So, consider adding this to your arsenal.