Cellular Attention Deficit Disorder: A social illness without recognized cause. Sufferers always appear to be speaking to their phone, dialing a number, texting someone, examining their voicemail, playing a game, etc. It is often rumored that the mobile phone may actually be attached to the target's hand. 1.A vacuum that sucks out of the soul via issue statements and Microstation V8 software. Complex and pointless. Is short for Computer Aided Drafting and Design. Also known at Eastern Technical highschool as "Retard's Engineering". 2. a vocation major taught by a robot called Mr. Glautemans. 3. an error that'll most likely end in bloodshed.