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.

Shell-Dicking by Auriman May 21, 2018

Shell yeah 

Phrase used as a play on words; the word "shell" replaces "hell"; used to express excitement or exaggerated agreement in reply to a previous question or comment

Friend: "Hey Shelly, do you want to go to the beach today?"
Shelly: "Shell yeah!"

Shell yeah by Shelly620 October 23, 2014

Shell-Head 

A nickname for Marvel's Iron Man.

Stan Lee: Spider-Man was Spidey, Captain America was Wing Head, Thor was Goldilocks. I loved calling Iron Man Shell-Head and Daredevil was Horn-Head.

Shell-Head by Run Like the Wind November 23, 2013

shell toes 

Adidas shoes with the toe of the shoe that is a large rubber cap that has lines running along it, making it look like a shell. Found commonly on the Adidas Superstar and Superstar II's.

I'm just a sneaker pro, I love Pumas and shell toes. ~ Nelly

shell toes by Shadow (Merc.) April 14, 2006

Shell Swallow 

Where a man stretches his foreskin around the head of another penis. The foreskin of the receiving end may or may not have foreskin. When absolutely sure that both parties have foreskin. It would be considered a sweater party.

My penis is so cold due to not having foreskin. Could you shell swallow me for warmth so that I may survive?

Shell Swallow by Shell Swallower November 19, 2012

shell out 

To pay for something, generally applies to paying large amounts of money

"Man, I had to shell out $300 for a new computer monitor."

shell out by Blackmac November 9, 2003

Shell out 

Having to pay an amount of money for something, especially if unexpected or having to pay more than one thinks is a fair price.

"I brought the whole family to the game, which cost a fortune. To make things worse, once I got there had to shell out to buy hotdogs, icecream, sodas, and baseball hats!"

Shell out by Mark D Smith November 10, 2003