In recent years, this has become a popular cover story for ignoring someone's phone calls and/or text messages. Your phone's battery died and the charger was at home, or you could not find the charger.
Shortly after Bill arrived at the lake, his boss texted him and asked if he could work on his day off. He decided to use the charger excuse.
A person who you are only planning to date for some specific purpose, I.e. to make someone else jealous, then you will ditch them when you no longer have a use for them. The term comes from people who purchase big, expensive televisions from Best Buy before their Superbowl parties, then return the televisions and get their money back.
John kept wanting to meet Luanne at the restaurant where his ex worked, making her wonder if he was just Best Buy dating her.