An exclaimation used to express theft. The more obvious the better. Also usually followed by running.
Marge: Mmmm. You don't have to start drinking right away. I waas
thinking we could go for a bike ride.
Homer: But Marge, the barflies are expecting me. Larry, and Barney,
and that guy who calls me Bill.
Marge: But you look better, you don't sweat when you eat any more, and
look -- holds up a wad of cash you've saved more than a
hundred dollars. I found it in your pants.
Homer: snatches money Yoink!
A word coined for "The Simpsons." It is the noise made by one of the characters in the show when they swipe or grab an object away from another character. The word was created by longtime Simpsons writer George Meyer, who claims that he was inspired by The Flintstones in coining the word.