Dilbert is a cubicle dwelling employee for a large soulless corporation. Along with his cynical and under-motivated co-workers, he labors fruitlessly under the bone-headed leadership of the Pointy-Haired Boss. Occasionally Dogbert, Dilbert's super-intelligent dog, gets Dilbert caught up in another wild money-making scheme, to Dilbert's regret. Written by
Did You Know?
Dilbert and Dogbert don't have mouths in the comic strip, but the animators needed to give them mouths for their dialog. They compromised by giving them mouths only when they spoke. Since the show went off the air, a mouth has been drawn on Dilbert in the comics, usually to show either surprise, screaming, or anger. (Dogbert, however, continues to be drawn mouth-less.) See more
Looks like somebody's not working.
Referenced in Family Guy: Da Boom