Usually one cool motha-fucka. He is usually a dark eyed, dark haired, tanned skinned, muscular man. They are usually really sweet and chill guys but, they can kick ass when its needed and they hardly lose. A Bertis can drive the sexiest girls wild, and shows them a good time. He is very flirtatious but once in a relationship, that girl is the only one for him. If you get one, keep em.
Look at that Bertis
Bertis is just a great guy and a good friend