Greek word denoting promiscuous male who engages in anal sex, possibly with both males and females, exclusively in dominant role ("the pitcher").
A kolobara who buggers other men may not be considered any less a man; rather, he may be viewed as a more formidable stud for buggering both genders prolifically.
He buggered Jane, Ann, Harry and Bob. For weeks they each cringed with pain whenever they sat down. He's quite a kolobara!