cooties

Cooties is a fictitious childhood disease, commonly represented as childlore. It is used in the United States, Canada, Australia, New Zealand, and the Philippines as a rejection term and an infection tag game (such as Humans vs. Zombies). It is similar to the British 'dreaded lurgi', and to terms used in the Nordic countries, in Italy, India and Iraq. A child is said to "catch" cooties through close contact with an "infected" person or from an opposite-sex child of a similar age.