A communication option on Facebook that allows users to say hello to or show interest in a friend without having to go through the tedious process of crafting coherent sentences in order to express one's self.
The Facebook poke is especially useful in the process of overanalyzing a potential romantic interest's feelings about you based solely on impersonal online interactions.
Stan: I Facebook poked Wendy two hours ago, but she hasn't poked me back yet!
Kyle: That sucks - I guess you're going to have to find a different prom date.
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