When one girl straps a dildo on her head (usually drenched with warm sperm), puts a pair of pre-creamed panties in her mouth, gets on all four, makes a sound like Dino from the Flintstones, takes off full blast and jack-rams the dildo into another girls asshole. This typically sends the girl who got nailed flying through the air. The term "girl" is interchangeable with "ass-banging homo."
As I peered through the lesbian's window, I witnessed a fat bitch perform the flying rhino on her skinny lesbian partner. I read in the paper the next day that surgery was required to remove the dildo from her ass.