Pibbling is exuberant canine silliness, as perfected by pit bull type dogs. It includes playing with friends and toys, hopping around, doing zoomies, making "art," rolling around, giving hugs, chewing, rearranging stuff, shopping and, of course, snuggling.
Confident one is correct to the point one is willing to bet cans of soda, especially Mr. Pibb. Part of a betting game established by Mr. K, math teacher.