A thin layer of chocolate on ice cream that will freeze up when it comes in contact with air.

Hence, fecal matter residue found on one's penis after anal sex.
"Dude, when I pulled out.. bitch gave me the Magic shell !"
by The Nitwitz January 4, 2004
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A Magic Shell shit is a shit that comes out as a thick brown liquid, but hardens into a solid when it hits the cold toilet water. Usually comes out shaped like a Dairy Queen chocolate cone. This heated liquid usually burns your asshole coming out.
Jay : Oh hell, I just shit out that burrito. It came out as a Magic Shell shit. The toilet almost didn't swallow it all.

Jan : What the fuck dude!?
by kainalukai July 20, 2011
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To paint one's flacid penis green, then dip the aforementioned painted penis in magic shell giving it a hard chocolate coating. Upon obtaining an erection, the newly green dick breaks free from its chocolate barrier in a Hulk-like Fashion. Hulk smash!
"You should have seen the look on that chicks face when I magic shell Hulked for her"
by Definatly Not Anthony April 1, 2012
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One does not simply define the Magic Conch Shell. It defines you.
Magic Conch Shell, can I define you?
-No.
by CameronBri April 30, 2014
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