Top Definition
What happens when hearing a new song and you aren't sure if the singer is a girl or a guy.
Person 1: Is this a girl or a guy?
Person 2: The Justin Bieber effect! But, its a girl that sings this song...
Person 1: Oh, its hard to tell...
by dagnija May 28, 2010

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.

×