You thought you could hack this, you bastard?
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3unicorns1boy: hows it going
3leethaxx00r: <script>alert("XSSPOSED")</script>
1unicorn3boys: You thought you could hack me, ye bastard?
by MrSherlockholmes May 31, 2016
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<script>alert(0)</script>, a common string used to find XSS (Cross-site scripting) vulnerabilities on the web.

Or

Someone attempting and failing to find an XSS vulnerability in Urban Dictionary.
Hey this site takes user input lemme just... <script>alert(0)</script>
Aw damn they sanitize user input properly! :(
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