The "Yoink!" is a classic Simpsons staple, ever since Homer took that wad of cash out of Marge's hands heading to Moe's in season 4, to later when it became a go-to catchphrase for celebrity guest stars (Mel Gibson, Ron Howard, Mark McGwire, etc). Because "Brevity is...wit", here are all the yoinks compiled into one video:

Also see: Yoink! 15 GIFs of Animals Stealing Things