Cuntknock

When the female is going so wild in sex that she slides off the slippery serpant and gravity takes it toll, thus resulting in her colliding with the shlong, causing a Cuntknock.

Darren - Dude gertrude was bloody mental in bed last night.
Josh - Dont talk about last night.. i got cuntknocked.
Darren - Ohhh bad times man sorry to hear it.
Josh - Yeah.. it was the worst.