There's this guy in your life who's always telling you about his next big project. It's going to be "revolutionary," he tells you. He posts Instagram photos from various bars and coffee shops with the caption saying something about spending the afternoon "brainstorming" or worse, "ideating." He tries to come off as a young Steve Jobs, but really what he comes off as is a douchebag.
He's never had a regular job—he's always been a "consultant," even when he was in his early 20's and didn't have enough experience to consult anyone on how to get to the bathroom. He's constantly jumping from job to job, company to company, idea to idea, and for whatever reason, it irritates the hell out of you.
Maybe it's because you share your grandfather's indignation for shiftless young people who have no sense of direction or loyality. Maybe it's because he never seems to be doing any actual work but somehow he can support himself just fine. Whatever the reason—get over it. One day, one of his ridiculous ideas might stick, and you'll very much enjoy flying in his private jet or staying in his palatial mansion.
Get him this Back My Startup T-Shirt ($25, Rap Shirts for White People) and tell him to wear it to his next investor meeting, like Mark Zuckerberg wore his pajamas to his investor meeting. Because both your friend and Mark Zuckerberg are major assholes. What a world.