Now, now.. i've gone ahead and become completely upset with orcish culture and rituals.. so i've done some homework and dug up even more phrases, and i strongely encourage anyone else too keep on looking. Would be nice too see more orcish phrases in, in-game roleplay.

Heres a few i found:
Logre'gard Noe Kal - A question. "Where do you want me" Saying this is essentialy asking for an ordre, i suppose. Put in a sentence fx: "Aka'magosh, chieftain! Logre'gard Noe kal?"
Lok'Naroche - "Look out" or "Too arms". put in a sentence, fx a Rrosh'tul like Rarg might wanna use this. "Lok'naroche, lok'tar ogar!"
Glor'du - Another greeting, more of a mix between, Throm'ka, Mok'ra and Grom'ka. And it is, well too my experince at least a way of saying. "Have we met?" A greeting too a stranger, but also more of a sort of question. Put in a sentence most likely something like:, "Glor'du, Mok'ra, orc" or so would Grogona say it..

Fit'chure - Fire, a command.
Lo'gosh - Ghost wolf, put in a sentence and considering that a Ghost wolf is something quite too be reckoned with an orc would say "Aka'magosh, Lo'gosk mok'ra" Meaning roughly translated Thank you, ghost wolf, good evening"
Lak'tuk - Suffering. Put in a sentence: "Your Lak'tuk, let me mend your wounds"