The shorthand of a popular pairing in Naruto between the highly popular character Hatake Kakashi and the fairly unknown character Mitarashi Anko. It is the most popular heterosexual pairing for Kakashi and the second most popular for Anko besides the repulsive OrochiAnko.
The het pairing of Kakashi and Sakura of the manga Naruto. This is a widely accepted pairing with a large fanbase, community and even fanfiction archive.
1. OMG, kakasaku is so HAWT! Like, even better than Gai/Lee!
2. Kakasaku? GROSS! I mean, he's like, 14 yearsolder than her! You perv!