Top Definition
1. A romance between two Ultimate Frisbee players.

2. Often involves exchanges of Birkenstocks as presents, romantic moonlit granola dinners, and engagement in protests against mega-corporations while holding hands.
We met at the Ultimate Frisbee tournament, and after we discussed how much we both liked Obama, we started an Ultimance.
by ShmuelHaynorweitzy April 12, 2009

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