crazy ant

noun

Definition of crazy ant

  1. :  any of various related ants that move in a quick, erratic manner and tend to be invasive pests: such as a :  a dark brown to blackish ant (Paratrechina longicornis) of tropical and subtropical regions that often forages long distances from the nest b :  a golden- to reddish-brown South American ant (Nylanderia fulva) that typically forms large colonies

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to cast off or become cast off

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