The one and only girl in a guy's life. Does not necessarily imply a bitch or a girl of high maintenance. Referenced in the pop song "Girlfriend" by Avril Lavigne.
Yeah, she's his motherfucking princess!
by JRRL August 09, 2007
A conceited girl with a sense of entitlement that knows no bounds.
I've gotta dump this Motherfucking Princess.
by Mr. Larz Blackman July 10, 2008