1. Someone who has been your best friend since you were a little kid and whom you have tons of inside jokes with.
2. Your very best friend out of all your other friends.
3. Someone whom you want to be best friends for life.
1. I've known Ashley since we were five, which makes us frubes!
2. Ashley is my frube, but don't tell Francesca.
3. Me and Ashley are frubes for life!