1. Short for "Saccharin Pop". The type of shitty pop music targeted towards thirteen year old girls. It is usually played annoyingly loud in malls and features heavily in teenage soaps and commercials. The music is bland, artificial, too sweet, has no substance or value, and leaves a bitter after-taste.
Named after the artificial sweetener saccharin, which is bland, artificial, too sweet, has no substance or nutritional value, and leaves a bitter after-taste.
2. Could also apply to the act of popping a sac filled with disgusting fluid.