Irony Banana 

When you lay down a banana in a Mario Kart game just to hit it on your next tap.

I thought that I was being smart by laying a banana in the narrow turn, but it turned into an irony banana when I hit it on the next lap.

Irony Banana by Suit Boy January 2, 2012

iron banana 

having a penis that has been through some tough wear and tear, such as broken cartilidge, a split urethra, etc.

"Damn, Jeff has an iron banana!"
"Your mom gave me an iron banana last night."

iron banana by Iron Banana January 24, 2016