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!”

by Urbandefinitionsaremypassion December 12, 2017

Hard Shelling

the act of female teabagging.

Rick: dude Jenny is totally going around hard shelling everyone

by cvcoleman September 13, 2010

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."

by something_else February 21, 2015