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"Happy Birthday!"
A slang way of saying "Happy Birthday"
A word originated from the Philippines. (Since there's no definition yet.)
Eg. 1 :

Ei! Bro! I'm greeting you in advance, "Haberday!" Stay Cool!

Eg. 2 :

Guy 1 : Hey! Isn't it November 1 today?
Guy 2 : Hella Yeh? y?
Guy 1 : Hey! It's my fooking bday!
Guy 2 : u sure?... kl! Haberday dude! Let's Partey!
by theblob.jp May 26, 2009