A girl who someone dates to get closer to her friend.
With the ultimate goal of dating her friend, you date girl A. When that relationship inevitably fails, you can move onto girl B, whom you have been getting to know throughout the span of the first relationship. Girl A was the step-girlfriend used to get to girl B.
מאת Chiakara 7 בנובמבר, 2009
1 more definition
A woman who dates a man that has children by another woman. The woman is the girlfriend to the father of the children and thus a Step Girlfriend to the children.
The children left their Mom's house to go visit their Dad and Step Girlfriend for the weekend.
מאת Glitterfly78 3 בדצמבר, 2009