O MISER MARCE. :(
*O miserum Marcum!
(If you were calling him and speaking directly to him, you should use the vocative. However, if you're just saying "O poor Mark!", you should use the accusative instead
But, how do you know Teacon don't say it directly to Marcus?
Sucks to be Marcus.
Can't hold his coffee, eh?
Perhaps the Parrots have died of cirrhosis. Therefore, it's time to introduce vocabulary we'll never see in Latin literature: Caffea
Especially since coffee was not available in the time of the Roman Empire!
quod caffeam nondum a Romanibus inventus est?
*Caffea (sive cafea) a Romanis non inventa erat
Coffee's from Ethiopia or thereabouts, isn't it?
Could be that Marcus' religion forbids him from such.