A slang way of saying "Birthday"
Also, "Happy Beer day"
A word originated from the Philippines. (Since there's no definition yet.)
Mark: Hey dude! Isn't it your beer day today?!
Allan: Hell yeah! c'mon!
Mark: kl! But we still have our final exams tomorrow, right?
Allan: Meh! It's only physics, it's gonna be EZ!
Mark: ayt! Let's get it on!