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The act of curling up into a ball due to severe period cramps
"Hey where's Jen?"
"Oh I'd leave her alone for a while. Last I saw she was armadilloing"
by Eye of the Tiger July 02, 2013
when you dump everything out of a backpack during class and unzip the small pocket of the backpack then squeeze all of the other slots in the small pockets from the inside to make a form of a armodillo then zip it up once done
hey man stop armadilloing my backpack
by Xx77Ian77xX June 16, 2010