A term used when a Jewish individual does something stereotypically not Jewish, or beyond their normal "straight edge" behavior; A hybrid of the term "Jew" and the show "Jackass", as heard occasionally on the Adam Carolla radio show.
In a rather perfect display of being a Jewass, Teresa opted to buy a doughnut for breakfast, rather than her usual choice; bagels.
by FyreDeity December 25, 2008