For English-speaking users: he is a character from the "Nu, pogodi!" (Russian: Ну, погоди! = Well, Just You Wait!) Soviet/Russian animated series (1969-2006).
The series follows the comical adventures of a mischievous yet artistic Wolf (Волк), trying to catch— and presumably eat — a hare, Bunny (Заяц). The original film language is Russian, but very little speech is used, usually interjections or at most several sentences per episode. The series' most common line is the titular "Nu, pogodi!", recited by the wolf when his plans fail.