Ka-Kow is an expression frequently used in the Adult Swim show Frisky Dingo. Mostly, it is used by Stan and Xander Crews. It is safe to presume it is an alternative to Boosh. It's meaning is very similar, in that it is used to express awesomeness on an extremely high level.
...of our new president, Ta'Qil, whose appointment is attributed to a corrupt supreme court justice..
-and more specifically, Stephen Breyer! Boosh!
- and/or Ka-Kow!