Boy, haven't read The Far Side in years. I think I recall that, though, lol. Gary Larson, I believe, wrote those.
Kemo Sabe was supposed to mean 'trusty scout' or 'faithful friend'. There have been numerous/humorous interpretations. In Spanish, 'qui no sabe', which means 'he who knows nothing'.
In the original series, both Tonto & the Lone Ranger refer to each other as Kemo Sabe (which now, for me, has a strange cancer-sounding similarity to chemo.) :-/