Inconvenience

I met a shabby man once, without a penny to spare, He has never spoken to me, He has done naught but stare, I'm unsure of his intention, he seems simply to exist, but he interferes with the world, He is my faliure, he makes me miss, He picks my brains and holds them up, To all who care to look, For he is inconvenience, And simply can't be shook.