1 definition by THIS BOAT IS REAL
The act of getting many people to write happy birthday on one person's facebook wall, even though its not their birthday.
Person 1: Dude, why is everyone writing happy birthday on my wall it's not even my birthday.
Person 2: Because we were birthday spamming you.
Person 2: Because we were birthday spamming you.
by THIS BOAT IS REAL March 8, 2011