Someone who has not mastered the very simple difference between email's "reply" and "reply all" actions. The RE-tard is consistently spamming a distribution list's mailbox with their comment, which is relevant only to them and the sender. A true RE-tard will do this even when the original sender of an email to many people list explicitly requests recipients do not "reply all."
I can't stand it when a new system rolls out at my job. My AVP boss always spams her stupid questions to the whole company like the RE-tard she is.
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failure shower.