Their behaviour is similar.
We have flocks of Canadian Geese that no longer migrate.
They take up camp, and crap all over the lawns of their hosts and benefactors. They are foul and noisy. And they do not know when to take a graceful exit and LEAVE.
Maybe he was a goose in a former life, or will be one in the next-And may it be soon.
That does describe him perfectly especially the crapping all over the place.