A really small animal that is an invertebrate. Some insects are pests. Others can be helpful. For example, bees make useful products like honey and wax.
Really small animals that are pests. Most insects are pests. ants, cockroaches, beetles, termites, and flies are all insects. Spiders are not insect. Spiders are arachnids.
When a person in your life becomes so annoying to the point where they are just purely obnoxious that you want to get them out of your life (almost like squishing a big to kill it)