A swirly tour is the act of giving someone a swirly in each toilet of both bathrooms, meaning the bathroom of the sex that he/she is and the bathroom of the opposite sex. It is commonly done by a group of girls to do the girls bathroom dirty work, and a group of guys to do the boys bathroom dirty work. To add more embarrassment the victim gets swirlied in the opposite sexes pee. And this prank should usually be done at school because if you did this in public it could be seriously bad. It could also be used as a funny prank or just plain being

mean.