A reference to a downpoint in ones life pertaining to the once popular game, "Flappy Bird". This term indicates a moment or circumstance in which someone is emotionally affected negatively and uses the metaphor "my bird hit the fan" to represent their life coming to a halt or changing for the worse.
Bro#1: Aw man I'm so stoked for this gnarly hot chocolate
Bro#2: Dude I'm so happy for you
Bro#1: FUCK MAN I TRIPPED AND DROPPED MY HOT CHOCOLATE. MY BIRD HIT THE PIPE
Bro#2: THAT FUCKIN SUCKS MAN