vuln
An abbreviation of the word vulnerable. Used primarily in 'internet speak'. Normally used when speaking about weak spots in an opponents skills or strategies in a game or in weak spots in computer code that a hacker exploits.
I am not sure I want to install Internet Explorer 8 yet; I heard there are a lot of vulns that need patched.
or
His vuln is that he has low fire resist so make sure you use fire damage against him.
or
His vuln is that he has low fire resist so make sure you use fire damage against him.