To start a hopple you have to post the receiver up on their neck and possibly elbows with the rest of their body suspended over them. You then jump or fall and land with your penis entering their body. A hopple has been successfully completed if at least one participant orgasms and at least one participant survives. They do not have to be the same person.
There are many variants of the hopple.
Hopple - Jump from a standing position and land in a posted up vagina.
Dropple - Fall from a height and land in a posted up vagina.
Hopplegore - Jump from a standing position and land in an anus.
Dropplegoral - Fall from a height and land in a hopple-positioned receiver's mouth.
You can modify the hopple with any number of prefixes and suffixes to suit your mood/skill level, from the standard hopple to the Necroppletopplegoral where you get a running start on a corpse, cross-check it into a hopple position while simultaneously somersaulting into the air and landing in its mouth.
Me: I tried to hopple her but she broke her neck and died.
Bro: Did you cum?
Me: No I broke my dick in half.
Bro: Hey man can you help me hold up this corpse so I can necropplegore him?
Me: FULL GAY!