1 definition by Horseburger

1. A marathon of riding roller coasters at any of the Six Flags locations
2. A period of intense sexual intercourse; a test of endurance.
1. You'all have a Six Flags day (common statement issued at the Six Flags amusement park).

2. Boy, did she give me a Six Flag's day.
by Horseburger April 4, 2010
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