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1.
When a guy ejaculates on a girls stomach, forming a flower shape with the belly button being the center.
"My baby was squeezing her fun bags together, hoping I'd launch a pearl neckace her way. But, knowing she loves flowers, I aimed lower and gave her a dirty daisy, instead."
by Porty April 18, 2008
 
2.
When a large group of overweight women (usually over 250 lbs.), gather around 1 toilet and each take a massive dump without flushing.
*Guy runs out bathroom*
- "What happened?"
- "There is a massive Dirty Daisy in stall #3!"
by DaisyDan69 April 21, 2011