yesterbirthday 

When your or someone else's birthday was yesterday.

Brian: I had a great birthday yesterday.
Fred: Happy Yesterbirthday Brian!
Brian: Yeh....thanks.

yesterbirthday by nFuriate May 10, 2008

happy yesterbirthday 

This is said when you forgot to tell a person happy birthday, and only remember the day after.

Bill: I had a great birthday yesterday...
Fred: Shit! Happy Yesterbirthday!
Bill: Yeh...thanks.

happy yesterbirthday by nFuriate May 10, 2008