1 definition by Right guard Power Strip

Top Definition
A person who comments on someones Facebook wall when its their birthday, and he/she have no idea who it is.
Kayla: Do you know this "Cody" kid?
Giovanna: No why?
Kayla: He posted "happy birthday" on my wall!
Giovanna: What a B-Day Crasher.
Ian: I'm bored.
Austin: Lets go B-Day Crashing later.
Ian: Sure.
by Right guard Power Strip February 14, 2011

Free Daily Email

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

Emails are sent from daily@urbandictionary.com. We'll never spam you.