Adj. To
tap or rap (with your fingers or a pen, for example) repetitively on a desk, keyboard or other solid object. Done in order to cause annoyance to other people close by to you, especially at work or school where you need to
concentrate.
Invariably perpetrated by people who think it's cool to do so, along with other annoying habits such as pen clicking.
*
tap tap tappity-tap, tap tap tappity tap...*
"I wish that tool would stop
shanding! He knows all the desks are
bolted together! I can't concentrate for him constantly shanding."
*rap rap-rap rap, rap rap-rap rap...*
"Dude, I really need to concentrate on this customers' order. Please, for the love of God, stop shanding"