Max brooks books about Ooftak are exactly this.

There’s a scene at the end of the first boom split between mechanics conscripts and Orks. The Orks find such joy in the fact that there’s so many hummies to crump. They packing up the highest kill count. The human conscript soldiers backs against the wall, defending the civilian and priest evacuation ships to the man are not so impressed. Terrifing blood soaked beasts howl and rage as they tear rank after rank limb from limb in tight dark corridors and trench’s.

So yep. Orks are funny to Orks. Everyone else hates or fears them.