What the pretty little fans of the j-rock band Antic Cafe are referred to as. The term was made up by Miku, the vocalist. The term is made up of 'cafe' and 'ko'. Ko meaning child. So, cafekko kind of translates to... Cafe child. So if you're an An Cafe fan, you're a cafekko! Yay for you!
I'm a nyappy cafekko, yes I am.