Diseases that the opposite sex has that gives you a reason to not be around them. When you get older, cooties becomes known as "STDs."
Age 8: "Ewww... She has cooties, I can't talk to her!"

Age 15: "Ewww... She has herpes, I can't sleep with her!"
by intelligent young'n August 25, 2003
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US slang that references childhood:

Cooties are an imaginary affliction from childhood.

When children reach the age where they notice the sexes are different the children claim a member of the opposite opposite sex will give you "cooties" if they touch you.

Its a way of little girls telling other little girls not to play with boys and vice versa
You played with little Jimmy? Ooow, your going to get cooties.
by claymuir October 3, 2005
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non-medical germs, that are spread by contact by touch, usually among schoolkids.

can be protected by a 'cootie shot', which involves tracing a 'circle, circle, dot, dot-- now you've got a cootie shot' on the palm of the hand.
eww, i can't believe kevin touched me! that was so gross and boys have cooties!
by lette November 24, 2003
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An age-old disease only found in young children. all children have this disease, but the boys have a different type than the girls. because of this, touching or being touhed by a member of the opposite sex is fatal, since you have gotten their cooties.
Don't touch that girl, she'll give you cooties!
by Chowderz April 19, 2011
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a pseudo-germ or false disease that children use to avoid or tease one another. Theorized to have come from a child's misinterpretation of a slang word "cootie" meaning vagina.
Boy: Dad, what's a cootie?
Dad: ...uh...well, it's something that all girls have.
Boy: Ewww, girls have cooties!
by Otaku2100 June 3, 2005
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The metaphysical manifestation of the fear of social backlash resulting from association with the opposite sex during childhood.

In short, the other sex has them, you can get them, and you do not want them.
(Josh is seen with Katie.)
Boys: Eww, Josh has cooties!
by Laevateinn January 1, 2010
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Highly Contagious, Viral batecteria that breed inside young females and are released into the air via sweat glands when in the proximity of other young boys.
Various forms of protection include, Sprays, Suits, and name calling.
"Oh no here comes Suzy, Quick guys into our anti cootie suits"
by reclaimer May 26, 2003
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