The act of taking someone's backpack in class and quietly emptying it of all materials, turning it inside out, putting the materials back in, and zipping it up.
...hey Andy, I'm gonna go "Fidangle" Cody... divert his attention from his bookbag...
Fodangle is the verb in which one person, fully erect, is kicked in the bottom of the penis with such force that when the penis hits them in stomach it has enough force to recoil and harm their testicles.