koopa shell 

A Koopa Troopa's only armor. After it has been removed, it can be used as a projectile to pown someone.

*Cheerleader gets hit by a Koopa shell* Powned! Or however you say that!

koopa shell by spel itt rite May 14, 2006

Koopa Shell 

You say this when you kick something that's big and has the possibility to pwn sum1's nads

Guy 1: Hey dudes, check this! KOOPA SHELL! *kicks a rubber ball*
*Rubber ball pwns someone's nads*
Guy 2: Oooh sthhhhh! Aaaagh! my nads
Guy 1: Now u know y i said "Koopa Shell"

Koopa Shell by your best idiot April 3, 2010