[inertia123]

My guess: Pugna, fornica, aut more!

(Or the plural imperative: Pugnate, fornicate, aut morete!)

I think "copulare" is too nice of a word. Fornication is derived from the Latin word for brothel. I'm sure there's a better dirty word but I can't think of it.

[PLMerite]

"(Or the plural imperative: Pugnate, fornicate, aut morete!) "

That sounds pretty close to what my aging brain cells remember...is that what Spartacus would have yelled at the approaching Legion?