Definitions by Obaka-san

bokukko 

A Japanese term used to name those girls that address themselves as "boku", a boyish way to address oneself, it's one kind of "moe" if you wonder .

one of the most famous "bokukko" examples is probably Ayu-chan from Kanon, a popular visual novel in Japan.

bokukko by Obaka-san June 29, 2007