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When a jewish guy or girl are in a relationship with another jewish guy or girl that was fixed up by their jewish parents based only on the fact that they are both jewish, around the same age, and single.
Mordecai: After I break up with my catholic girlfriend, Maggie O'Flaherty, my parents are totally gonna try to arrange a jewmance for me to partake in.
by Rutabaga Ogilvie March 07, 2009
to be ripped off in a finacial sitation, or to be robbed
dude 1: Dude what happed to your house?
dude 2: oh, i got reposessed after the jewmance with Bernie Madoff.....
by Bolesterol April 08, 2010