Refers to the boner of an Asian male: mango because it is yellow, stiffy meaning erect penis. Select promiscuous females may even tell you that the renowned mango stiffy truly tastes like mango. It is paramount to fully embrace the oncome of the mango stiffy.
Bob: Why do so many girls like that Asian kid?
Juan: Idk man, but I’ve overheard the girls over there talking about “mango stiffy?” Don’t know what that’s supposed to mean…
Pung Tang (Asian Kid): HOES LOVE THE MANGO STIFFY 8==D