dick shell

a condom: something you put on your dick to keep a girl from getting pregnant

"my dick shell smells like strawberries!"

Shell-Dicking

The act of evicting a turtle from his home shell via backend penetration such that one's penis becomes the new inhabitant of said shell.

Shell-dicking:
I'd like to shell-dick Yertle the Turtle.
That turtle didn't pay his rent, so I had to shell-dick his ass to the street.