The act of aiming only to wreck/spinning out the first place person in a racing video game; much like the spiked shell from Mario Kart. Often frowned upon and seen as immature.
John: Me and Mike spent all last night spiked shelling in Grid. We almost took out the whole field, one by one.
Greg: You're a douche. Grow up.
Greg: You're a douche. Grow up.
by Jerry the Racecar Driver October 20, 2009

Male: Don't call me cis male gender. It's dehumanizing.
Pro-Trans: Stop being transphobic! You don't know what it's like for us!
Male: Maybe if you weren't so soft-shelled.
Pro-Trans: *initiates physical altercation*
Pro-Trans: Stop being transphobic! You don't know what it's like for us!
Male: Maybe if you weren't so soft-shelled.
Pro-Trans: *initiates physical altercation*
by Mr Jiggles le kek August 17, 2020

1, Something hard, like a mollusk, made out of calcium carbonate, and or calcite or aragonite.
2, A clam.
2, A clam.
by Defenation April 24, 2021

Usually will happen when it's cold out and your balls shrivel up nice and tight to get warm. (The wrinkles look like the pattern that a turtle shell could have)
by Herbert G. WALLCE March 1, 2019
