Facebook Poke
A
Facebook feature that allows you to Poke any of your friends on
Facebook as a way of saying "hello". After getting poked on Facebook, the
notification shown to the right appears on your Facebook page that allows
you to poke back or remove the poke. To poke a friend, visit their profile
page and click the Poke button in the top left-hand corner of the screen.
Also see: Facebook, Internet definitions