A girl with whom you had an informal relationship, never quite defining whether or not she was your girlfriend. Stands for "Former Semi Girlfriend"
I went to a few movies with this girl, and then she was like, "I'm goin' out with this other guy!" Now she is my FSGF.
by Ben Cannon May 19, 2005
Get the FSGF mug.A girl who beings to go out with 1 of your friends and is a lil bietch so steals your friend from u.
by Snoop April 19, 2005
Get the FSGF (friend stealing girlfriend) mug.