The act of incoherently perceiving everything or anything as a sign and/or clue of a highly anticipated upcoming occurrence.
This phrase originated in Blizzard Entertainment's Diablo 3 Message Boards when the highly-anticipated Closed Beta version of Diablo 3 game was on the verge of release. Users began posting incoherent events as signs that the Beta was about to begin. Nearly all of them proved to be false, or were jokes.
A pigeon just flew above my head whilst upside-down. Sign of Beta.