A made-up word by Vinny from Vinesauce in his third The Messenger stream. The definite definition of this very word is unknown. Vinny, the founder of the word said that (in his own loose words) that this meant "the lack of jizz" (Note that this is a noun, not a verb or adjective.)
Unfortunately, this failed to become a new word since there exists an Ebay account called just that.
"One more. One more time. Jizlak. Jay-i-zee-el-a-kay. Jizlak." -Vinny
To describe a classmate/co workers, as a virgin. To be specific of what said someone is, is someone who particularly enjoys games like: "Dungeons and dragons" "skyrim" or shows like "game theory" or "game of thrones" The word would fit for this, do to it sounding like "Wizard"
God, I fucking hate Danny! He thinks he's smarter than everyone, when he's really a fucking jiznard!