to remain silent or hold oneself aloof in a sullen, ill-humored, or offended mood: Promise me that you won't sulk if I want to leave the party early. a state or fit of sulking. sulks, ill-humor shown by sulking: to be in the sulks. Also, sulker. a person who sulks.
Some cite the fact that secretions from the millipede repel other insects as a reason why they are beneficial. While millipedes do not bite, the sight of them can still be unnerving, especially when they appear in large numbers. They have the ability to crawl up walls and enter homes through small openings.
Some people also refer the maxillipeds as the Poison Claws. The maxillipeds or poison claws are located at the top of the centipede's head which allow them an easy access to deliver their bite. Upon biting their victims, they will inject their toxic venom through those claws. Luckily, most animals including humans have strong immune-resistance against their deadly bites (but except for the pain). Most of the victims of centipede bites are the children who loves to play on the dirt, gardens or outdoors.