The act of putting the girl on her stomach then sitting on her hamstrings while having sex with her at the same time. And bending her legs upwards and locking her feet on your armpits at the same time pulling on her arms back towards you. Then just ride her like a sled.
"WARNING" this will hurt your first time. :)
Bro I got with this crazy chick last night. I road her all night like a Bohemean Bobsled.