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.
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.