a moon with the penis and balls tucked under so the people witnessing the moon can see your man parts. This makes everything look sort of like a basket of pre-arranged fruit. hence the name... its one of the most unholy things a human being can witness, it makes most gag like the piss snow cone from Jackass: The Movie
Dude! Robbie just drove by with his shit pressed against the window, screaming "FRUITBASKET!!"