Brutus, always one to lavish compliments on Rancid Veeblefester, actually gives us the side-eye in today's strip. Even Brutus feels like this was a stretch. It's one thing to force/threaten an employee to say nice things about you but quite another to say "I'm perfect!" about yourself.
Jingo, for whatever reason, is a euphemism for Jesus or God. Why? Well, your guess is as good as Wikipedia's.