A Jazz waltz is a waltz in jazz style, thus played in a syncopated 3/4.
A few familiar jazz waltzes are: "My Favorite Things", "Jitterbug Waltz", Vince Guaraldi's "What Child Is This" (a.k.a.) "Greensleeves", and "Skating" from A Charlie Brown Christmas.
The following were either composed as jazz waltzes, or are frequently played as such.