Weebletown Cooties

Straight from Wikipedia so they must exist.


"The Commonwealth/British English equivalent is "the lurgy".

Originally, the term implied body lice, but over time this became generalised first to any sort of lice, including headlice, then later to purely imaginary stand-ins for just about anything that is considered repulsive. Although the origin is not explicitly known, it can be speculated that the imaginary disease was conceived from reference to how cooties(meaning body lice) can be spread through physical contact with the infested body region.

Certain situations call for the "cootie shot", which can be administered in a variety of ways. The most common is to draw two circles and two dots with a finger on one's arm, while saying the rhyme "circle, circle/dot, dot/now I've got my cootie shot." This can be used as a vaccine against future cooties, or as an antidote to make up for cooties one might have already acquired. "Circle/circle square/square, now I've got it everywhere" protects the person's entire body.
The other variation of the cootie shot is for the infectee to quickly grab the nearest pen or pencil in their immediate vicinity and to apply the tip of said pen or pencil to their arm as if using a hypodermic needle (though, obviously, with no actual penetration of the skin). The infectee then heaves a sigh of relief."