The phrase "soul sisters" refers to female friends who have a deep connection, understanding, and support for each other. They are like sisters in their bond and shared experiences. Full definition
Also, you might be by soul sister because I am equally as obsessed with stripes as you are. (violettedaily.com)
I definitely think that we are vintage soul sisters, as I'm in love with all of your posts and definitely agree that we seem to share a lot in common! (chronicallyvintage.com)
Your grandma and I just might be soul sisters as I also was born with a sugar deficiency! (glutenfreeonashoestring.com)