That one's "de mortuis nil nisi bonum [dicendum est]." I learned it from Naomi Chana, a favourite Angel commentator of mine, who paraphrased it as "you don't talk smack about dead people."

Well, okay, Z...

Sumus Quod Sumus ("we are what we are," the motto of Lake Wobegon) is sort of my default reply whenever Latin comes up, even tangentially.

It was a greek saying originally,first spakethed by Chilon of Sparta.

Ceterum censeo Carthaginem esse delendam.

Okay. As would seem to be usual, I was trying to make something even more complicated and linguistic-y out of it.

El stampinium thingamanus.

To get back to the original question...

Potato.

A fish?

Three fish.

Ha! Full house, aces over!

Sorry, but my Royal Fizzbin trumps all!

Not so fast.

Octavo.

Read 'em and weep ;)

*reads it and explodes*

Allameraine!

Hmm, what word is so powerful, so shocking that it trumps "allamaraine?"

NI!

Curses.

I shall have to say to you:

jujuflop.

Sorry, but I think Ni trumps all. Jujuflop is down there with shazbot.

You force my hand.

Belgium, or if that won't do it...

...Nephelokokkygian!

Ooooh, Ni versus Belgium, there's a poll waiting to be made by someone else.

Aaaand that brings me neatly round to...

Mornington Crescent.

Win awards!