Ping

ping, to ping, v. 1. a small amount of damage done to a character. Ex: "The rat pinged you for 2 HP." 2. A message sent from one person to another, usually over the internet or texting. Ex: Hey Brad, my street samurai is going to ping his fixer for some info."
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Addendum# 1: (Definition 1) One way that the term ping came into our group as a synonym for "bing" was from Magic: The Gathering. There was a card called Prodigal Sorcerer that had an ability to do a small amount of damage when activated; this damage was often referred to as being "pinged". It carried over to our RPG games.
Addendum #2: (Definition 2) Being contacted on the Internet through instant messaging services or texting is referred to "pinging" originally from the term ping, which meant the time it took from a computer to contact a server or another computer over the net. As Internet culture has come full force into gaming, more of these terms are used at the game table.