Zyngar™, noun, is a de facto trademark of Zynga, Inc.
Zynga is a Web 2.0-based social network game developer that owns browser-based games that work both stand-alone and as application widgets on social networking websites such as Facebook and MySpace. Mafia Wars, Texas Hold'em Poker, Cafe World and Frontierville are among their most popular properties, with tens of millions of players in each one. Zynga has learned that, more often than not, they can get away with stealing from their entire customer base, using Zyngars™.
A classic example of a Zyngar™ is in Mafia Wars. If you have adequate Reward Points while working the Robbing Board (which may require thousands of individual clicks), a random pop up appears, precisely where your mouse cursor is, and automatically spends some of those RPs, which you paid for with cash. you do not even have to click on purchase, a mosueover will spend your money, without so much as a confirmation button, which Zynga refuses to provide.
In Texas Hold'em Poker, the Zyngar™ is that they "sting" you with popups every time you win a hand, and the application freezes, every single time, forcing you to lose the hand and possibly getting bumped off the table. It actually turns out that, winning a hand is the Worst Thing that can happen in Texas Hold'em Poker.