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1.
A term used in Eastern NC when one of your friends is nowhere to be found, because he/she is trying to avoid having to tell you they are doing something better than hanging out with you.
John: What's Dave doing?
Adam: Man, I tried calling him to; he's got to be shellin with his girl.

Mark: Man wtf is up with Pat? I haven't heard from his ass in a week.
John: No clue dude he's a shell motherfucker.

Alice: What's Alyssa up to?
Mary: She didn't text me back either, I think she's shellin for some reason.
por shellfacenb11 02 de Dezembro de 2010
 
2.
When an individual is wearing nothing but the outer layers of clothing and nothing underneath. no shirt, no underwear, no socks. just shoes, pants, and a jacket or sweatshirt of some sort.
Mike: dude, arent you hot wearin that jacket and pants?
Dude: nahhh man, im shellin, it feels so good.

Jim: gosh, feels wierd being all dressed up while at the beach.
Jake: everytime i come down here im always shellin it.
por D-man jiggaboo 04 de Abril de 2011