Karg is a word made up by GM Tim just randomly while dying on halo3 as an elite it has many uses and also like blarg it has many meanings.(also karged or karger)
Boy 1 - "I heard we have Kargus today."
Boy 2 - "Ugh, I cannot STAND that man."
Boy 3 - "I don't know, he's alright. He taught me about The Secret the other day."