Latin, translation: "Thus always to tyrants", purportedly (but unlikely) uttered by Brutus at the assassination of Julius Caesar. The phrase is meant to signify that tyrants will always be overthrown and removed from power.
The other person who defined this just got it flat out wrong. Didn't think people could be that stupid.
mutation from the Latin meaning "always a dog", always being a dog, always base and self-gratifying, always begging handout, freebees, sex, gratuities. Always "dogging it".
When Zeb related to ladies and friends in his base self-serving way he was "Semper Fido" - always doglike.