When you date a girl, but you are ashamed to tell your friends about her because she is fat or ugly or something.
ME: "Hey, I really like you, will you date me?"
HER: "Of course!"
ME: "Great, but hey, uhm, could you be my Secret Girlfriend?

HER: Secret Girlfriend?
ME: At least til you lose some weight."
by Erik with a KKKKKKK September 19, 2009
The girl who is rely your gf and not anyone else no matter what and cant not be changed no matter what
dude1: im dating this girl kodi dude: no way bitch shes my secret girlfriend hands offf rofl copter
by acdc117 April 15, 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.

×