Please Don't Speak To Me While I'm Not Listening T-Shirt
Huh? What was that? I wasn't listening. A shirt for the sarcastic bastards out there who like to mess with people. Or at least like to let people know they don't always pay attention.
Perfect for most work environments, so long as you're allowed to keep it casual in a t-shirt. After all, while you might even have a great job, there's always a co-worker or two that you just have to zone out on.