Dirk

Dirk: noun. Yet another word describing facial expressions in dogs, a dirk is a condescending smile (also known as smirk) common to these cunning canines. Dogs dirk on many occasions, for example when their master throws them a stick and they can´t be bothered to lift it for him, leaving the person to go and collect it himself, while the dogs sit and watch feeling very amused. As with diles, dirks have been observed in many other organisms, including divers, dressers, Davids, deinonychuses, deinosuchuses and duck-men.