Hard Shelling
the act of female teabagging.
Rick: dude Jenny is totally going around hard shelling everyone
hard shell
If you have a high bone density, then you have a hard shell- meaning a skeleton that is tough to break or fracture.
Larry fell out of tree and broke no bones, he must have a hard shell!”
Hard Shell Taco
The equivalent of "Morning Wood" Hard Shell refers to the hardened clit and Taco refers to the vagina.
"I woke up with a major Hard Shell Taco today."