When you meet a girl on the first night of a festival and can't get away from her for the rest of it, having a festival relationship.
E.g.meeting on the first night and clinging to eahcother for the rest of the festival hoping for some action. Hence a festival girlfriend. But when the festival ends never speaking again.

Have you seen Josh ?

Nope think hes with his festival girlfriend...
by biscuitbase August 7, 2011
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