Top Definition
The act of holding up your head with your palm, knuckles, or hand in general. A position used for falling asleep in school, at the job, or just a sign of boredom.
Person 1 : You look comfortable!

Person 2 : Yeah, I set up an armshelf!

OR

Person : I'm comfortable

Other Person : YOU GOT ARMSHELFED
by BobbyBaja December 10, 2009
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