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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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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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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Imaginary infestations of the truly un-cool.
Ew, get away from me, you have cooties!
by OneBadAsp October 23, 2006
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an invisible bug thats on boys and girls
you get cootiefied after hangin out and being close to the opposite sex
you get very itchy
ahhh!!! clay gave me the cooties!!
by blehmonster August 6, 2007
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