To eat or consume something quickly and aggressively. This is done in a way comparable to how your girlfriend eats her way through an entire bucket of popcorn at a movie theater before the trailers are even finished. Popcorning is a common practice in American buffets.
When you like alot of people and your just jumping around talking or flirting with them.basicly it means you have no clue who you want and your just POPCORNING around seeing who fits your needs