Asian, mostly from Siberia and Far East Russia (ethnic slur). Initially the name of a tribe from Chukotka, that is often referred to in jokes as particularly daft. Sometimes used in the general meaning of “idiot, twit”.
Блин ну почему я такая чукча то…
Blimey, why am I such a twat…
(Мармеладная @ pepsilight.ru, 11/2010)