Top Definition
A major whirlwind of shit.
I walked into an F5 Shitnado at work.
by virtualmichael July 08, 2010
1 Word related to Shitnado
When you got the stomach rumbles and you know it's gonna be a bad shit
Girl, I got to go home. There is a F5 shitnado coming on!
by Muffin top 24 February 27, 2015

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