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.
Kyle: That sucks - I guess you're going to have to find a different prom date.
A Facebook Poke has been known to lead to a "Poke War" in which two people continue to poke eachother until one stops. The person who stopped poking back lost, thus making the other the winner of the "war"
.. on a personal note, I think Facebook should get a 'dislike button' ., (:
Note: This definition might just appeal to the younger generation >.<
Verb-(2)The online equivalent of an awkward silence.
Guy #2: "Shit Tyrone, get it together!"