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A Kid on the internet who usually gets butthurt when you try and hurt his ego.
Bro Will is such a sider.
by King24pm September 14, 2018
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A person who attends Westside High School in Omaha, Nebraska. They are known for their incredible good looks and showing up at other schools parties and making them more fun. Sider women are usually pursued by not only Siders, but also Prep kids.
"Are there any Siders coming to your party?"
"You know it, bro. Wouldn't be a party without them!"
by bigkittykat September 02, 2008
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