A fork of Rural Dictionary
A SGF does not let his girlfriends make poor decisions especially when the sitution involves a guy.
secret girlfriend, a girl from a couple who don't want to reveal their relationship
boy: I like you! girl : if my parents find out it could be very embarrassing! boy : I guess your my sgf then..
Short for "Sexy Girlfriend".
Hey sgf, you look great in that short skirt.