Having trouble concentrating? Maybe you have ADHD, a newly coined acronym for a timeless disorder. If so, I doubt if you've read this far along. Dunt nana nunt da da dunt. Back in black ... out the sack, I'm glad to be back! Sorry just had a retro AC/DC semi ADHD moment. This great looking AD/HD shirt features retro styling on a quality black tee. Hey look, a squirrel!