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.
Centipedes That Are Dangerous To Humans. Centipedes are predators. They eat insects, spiders, and other centipedes. The large centipedes even eat lizards, birds, and small animals. They have a pair of claws at the front of their body. The claws have ducts that can deliver venom. The centipedes use the venom to paralyze their prey.