A friend that will always have your back even though he's a cunt at times. He's very unforgettable and will be the best to talk to your problems about. Love to call his friends a bitch.
Jacobe: Hey you
Person: What
Jacobe:You're a bitch
Person:Fuck you Jacobe
A lie that is so rediculous that it is laughable. A person usally jacobs to impress their friends, but it often backfires causing the friends to dislike the jacober.
Billy tried to jacob his friends, and now they all hate him. Thus is jacobism.