Top Definition
The sudden avalanche of birthday greetings posted on facebook etc when someone notices its your birthday....particularly funny when someone incorrectly posts Happy Birthday and everyone follows suit!
Fran: "Michael, your birthday is definitely tomorrow isnt it?"

Michael: "10 years Fran, its been 10 years. Why?"

Fran: "Your cousin's started a Birthday Avalanche on your Fb profile!"
by Fran P April 17, 2009
5 Words related to Birthday Avalanche

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.