Deff Skwadron has just been reedited after quite some years out of print. It is a black & white short stories comic depicting an elite squadron of ork pilots and their adventures fighting against another ork warboss.
It is quite hilarious, both in the situations that happen and in the way the orks act and speak. You can feel it is old, when Games Workshop didn't made the orks too serious and almost everything related with the greenskins was humorous.
The drawings are very nice too, and everything is depicted accordingly to the Warhammer 40,000 setting. It feels a bit short, but because you enjoy reading it and you desire more.
I had some good laughts while reading it, if you like the orks definetly recommended.
Thanks to Agramar for his original post talking about this comic, I didn't even knew it existed!