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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A day that starts off great, but then just crumbles and becomes a total mess.
Wow, that was one rough Six Flags Day
by Airtime Grills April 2, 2021
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As an employee pretty much it means go f*ck yourself.
Guest: “Why can’t I bring my phone on this ride, this is f*cking stupid, go f*ck yourself.”
Six Flags Employee: “Have a six flags day”
by Jose0213 May 7, 2018
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A day at a Six Flags location where the employees continuously tell you to "Have a Six Flags Day" when you wait in line or get on a ride,its meaning is unknown
Six Flags Employee:Have a Six Flags Day!
Random Park goer:What the hell does that mean?
by Quikshotz1 April 11, 2010
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